The value of b that makes the expression 9(a+5) and 9(b+a) equivalent is 5.
To make the expression 9(a+5) and 9(b+a) equivalent, we need to find the value of b that makes them equal for all values of a.
We can start by expanding expressions using distributive property of multiplication:
9(a+5) = 9a + 45
9(b+a) = 9b + 9a
Two expressions will be equal if 9a + 45 = 9b + 9a for all values of a.
Simplify this equation by subtracting 9a from LHS and RHS:
45 = 9b
Finally, divide by 9 by b:
b = 5
To make the expressions equivalent, we need to find the value of b that makes 9(a+5) equal to 9(b+a) for all values of a. We can do this by expanding both expressions and equating them, and then solving for b. The value of b that we get is 5, which means that we can rewrite 9(a+5) as 9(5+a) to make it equivalent to 9(b+a).
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a colony of bacteria starts at 10,000 and the number doubles every 40 minutes. find the formula for the number of bacteria at time t.
The formula for the number of bacteria at time t is given by N = 10,000e^(0.0173t).
The formula for the number of bacteria at time t can be found using the exponential growth formula. The formula for exponential growth is given by;N = N0ertWhere;N is the number of bacteria after t minutes.N0 is the initial number of bacteria.r is the growth rate.t is the time interval.
To find the formula for the number of bacteria at time t, substitute the given values into the exponential growth formula.N0 = 10,000r = ln2/40 = 0.0173 (since the number of bacteria doubles every 40 minutes, the growth rate is equal to the natural log of 2 divided by 40.)t = t minutesN = 10,000e^(0.0173t)
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john is looking for an existing multi-story building zoned for mixed-use. he wants to open a small, by-reservation-only restaurant on the lowest floor. local code requires 15 square feet per person in a commercial setting with non-concentrated seating. what is the minimum square footage he needs to serve 50 people?
To serve 50 people, the minimum square footage needed would be 750 square feet.
Let us analyze the given question and solve the problem given. The problem is asking about the minimum square footage of the multi-story building that is required to open a small restaurant on the lowest floor. The building is already zoned for mixed use.
John wants to open a small, by-reservation-only restaurant on the lowest floor. He needs to calculate the minimum square footage he needs to serve 50 people. Let's calculate the minimum square footage that John needs to open the restaurant. If local code requires 15 square feet per person, then 15 x 50 = 750 square feet are needed for 50 people. In other words, John needs at least 750 square feet of space to serve 50 people at his restaurant.
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13) Ellen wanted to buy the following items: A DVD holder for $19.95, headphones for $41.25, and a personal stereo for $30.65. How much money does Ellen need?
Answer: $91.85
Step-by-step explanation:
19.95 + 41.25 + 30.65
= 91.85
And bro, its not that hard to simply calculate it in your head, or even on a paper. Like literally, there's calculators too
4 3/4 plus 1/3 what does it equal
what fraction of the numbers from 1 to 20 contain digit 1
Answer:
11/20
Step-by-step explanation:
1,10,11,12,13,14,15,16,17,18,19 All have the number "1"
there are 11 of them so 11/20 have the digit 1.
:)
Answer:
To find the fraction of the numbers from 1 to 20 that contain the digit 1, we can count the number of such numbers and divide by the total number of numbers from 1 to 20.
The numbers from 1 to 20 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.
The numbers that contain the digit 1 are: 1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19.
Therefore, there are 11 numbers from 1 to 20 that contain the digit 1.
The fraction of the numbers from 1 to 20 that contain the digit 1 is:
fraction = number of numbers containing 1 / total number of numbers
fraction = 11 / 20
So, the fraction of the numbers from 1 to 20 that contain the digit 1 is 11/20 or 0.55.
(Please could you kindly mark my answer as brainliest you could also follow me so that you could easily reach out to me for any other questions)
Find and prove algebraically the solutions (coordinate points) to the system of equations?
fx=x²+2x-1 and g x=x+1
Answer:
(x, y) = (-2, -1) or (1, 2)
Step-by-step explanation:
You want to find the algebraic solutions to the system of equations ...
f(x) = x² +2x -1g(x) = x +1SolutionThe x-value of the solutions will be the solutions to ...
f(x) = g(x)
f(x) -g(x) = 0
(x² +2x -1) -(x +1) = 0 . . . . substitute for f(x) and g(x)
x² +x -2 = 0 . . . . . . . . . simplify
(x +2)(x -1) = 0 . . . . . factor
The zero product rule says the solutions will be values of x that make one or the other of the factors zero.
x = -2 or +1 . . . . . . . values that make the factors zero
y = x +1 = -1 or +2 . . . . from the equation for g(x)
Solutions are (x, y) = (-2, -1) or (1, 2).
ProofWe already know that g(x) is satisfied by these x- and y-values.
f(x) = x² +2x -1 = (x +2)x -1
f(-2) = (-2 +2)(-2) -1 = 0 -1 = -1 . . . . . (-2, -1) is a solution
f(1) = (1 +2)(1) -1 = 3 -1 = 2 . . . . . . . . . (1, 2) is a solution
These values agree with the above, so we have shown the solutions satisfy both equations in the system of equations.
can you do a step by step explanation please and thank you!!!
The total area of the shaded region is 67.92 sq. in.
What is sector of a circle?A sector is a section of a circle that may be described using the following four criteria:
Two radii and an arc surround a section of a circle. The two sectors that make up a circle are referred to as the minor and major sectors. The main sector of the circle is the larger area, while the minor sector is the smaller area. The circle is split into two equally sized sections in the case of semicircles.
Let us suppose the central angle of the shaded portion = x.
From the given figure we observe that angle DEC = 143 degrees, and angle AEB are equal as they are vertically opposite angles.
The angle formed by the shaded regions are same as they are vertically opposite angles.
Thus,
143 + 143 + x + x = 360
286 + 2x = 360
2x = 74
x = 37
Now, the area of the sector is given as:
A = α/360 πr²
Here, r = 10.4 in.
Substituting the values:
A = (37/360)π(10.4)²
A = (0.10)(3.14)(10.4)²
A = 33.96 sq in.
There are two shaded portions thus:
Total area = 2(33.96)
Total area = 67.92 sq. in.
Hence, the total area of the shaded region is 67.92 sq. in.
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Pls help due tomorrow!!!
Answer:
C = 11,21 cm
using the formulas :
A (area) = 10 [tex]cm^{2}[/tex]
A = π [tex]r^{2}[/tex]
C = 2 π r
colving for C :
C = 2 *√(π*Α) = 2 *√(π * 10) = 11,20998 cm
find the area of the circle shown. the diameter is given.
Answer:
624.26 m²Step-by-step explanation:
We are given with a circle whose diameter is 28.2 m
Then, Radius will be diameter/2
=> 28.2 /2
=> 14.1 m
Area of circle = πr²
=> 31.4 × (14.1)²
=> 31.4 × 198.81
=> 624.26 m²
Therefore, the area of the given circle is 624.26 m²
On a certain route, an airline carries 9000 passengers per month, each paying $30 . A market survey indicates that for each $1 increase in the ticket price, the airline will lose 50 passengers. Find the ticket price that will maximize the airline's monthly revenue for the route. What is the maximum monthly revenue?
Let's start by finding the current monthly revenue of the airline for the given number of passengers and ticket price:
Monthly revenue = number of passengers x ticket price
Monthly revenue = 9000 x $30
Monthly revenue = $270,000
Now, let's find the number of passengers for each $1 increase in the ticket price:
Number of passengers lost = 50
So, for a ticket price increase of $x, the number of passengers will be:
Number of passengers = 9000 - 50x
The ticket price will then be $30 + $x, and the revenue will be:
Revenue = (9000 - 50x) x ($30 + $x)
Revenue = 270,000 - 1500x + 30x + x^2
Revenue = x^2 - 1470x + 270,000
To find the ticket price that will maximize the revenue, we need to find the vertex of the parabola given by the revenue equation. The x-coordinate of the vertex is:
x = -b/2a
Where a = 1, b = -1470, and c = 270,000.
x = -(-1470)/2(1)
x = 1470/2
x = 735
So, the ticket price that will maximize the revenue is $30 + $735 = $765. The maximum monthly revenue is then:
Revenue = (9000 - 50(735)) x ($30 + $735)
Revenue = 105 x $765
Revenue = $80,325
Therefore, the ticket price that will maximize the airline's monthly revenue for the route is $765, and the maximum monthly revenue is $80,325.
Convert 2-³
=
into logarithmic form.
O log₂ (¹) = -3
O log₂ (-3) =
○ log(:) (−3) = 2
O log_3 (2) =
1/8
The expression 2⁻³ = 1/8 into logarithmic form is log₂(1/8) = -3
How to convert the expression into logarithmic form.In logarithmic form, the equation 2⁻³ = 1/8 can be written as log base 2 of 1/8 = -3.
Mathematically, we have
log₂(1/8) = -3
This means that the exponent that gives 2⁻³ is -3, and the logarithm base 2 of 1/8 is -3.
Logarithmic form is often used to solve exponential equations where the variable is in the exponent.
In logarithmic form, the variable is moved from the exponent to the logarithm, making it easier to solve for the unknown variable.
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One pump can fill a swimming pool in 4 hours. A second pump can fill the pool in 6 hours. If the pool starts empty, what part of the pool will be filled in each situation? The first pump works for 5 hours and the second pump works for 6 hours.
According to the solving this word problem It will take the slowest pump [tex]\frac{7}{2}[/tex] hours to complete filling the pool.
What does a math word puzzle entail?A math word problem is a question that is written as one or more sentences and asks students to use their mathematical understanding to solve a problem from "real life." In order for kids to understand the word problem, they must be acquainted with the vocabulary that goes along with the mathematical symbols that they are used to.
According to the given information,
The first pump can fill the pool in 4 hours, so its rate is 1/4 of the pool per hour.
The second pump can fill the pool in 6 hours, so its rate is 1/6 of the pool per hour.
The total work done in fraction by both pumps in an hour is:
[tex]\frac{1}{4} + \frac{1}{6} = \frac{5}{12}[/tex]
The remaining work to be completed by the slowest pump is:
[tex]1 - \frac{5}{12} = \frac{7}{12}[/tex]
The ratio of the amount of work left to be done by the weakest pump's work rate determines how long it will take to fill the pool:
[tex]\frac{7}{12} \frac{1}{6} = \frac{7}{12} * 6 = \frac{7}{2}[/tex]
According to the solving It will take the slowest pump [tex]\frac{7}{2}[/tex] hours to complete filling the pool.
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y=3x-1
y=2x+7
solve by substitution
Therefore, the solution to the system of equations is x = 8 and y = 23.
What is equation?An equation is a statement that shows the equality between two mathematical expressions using symbols, numbers, and/or variables. Equations are used to describe relationships between different quantities, and they are commonly used in many fields, including mathematics, physics, chemistry, engineering, and economics.
by the question.
Let's solve the first equation for y:
y = 3x - 1
Now we substitute this expression for y in the second equation:
2x + 7 = y
We can substitute 3x - 1 for y in this equation:
2x + 7 = 3x - 1
Now we can solve for x:
2x - 3x = -1 - 7
-x = -8
x = 8
Now we can substitute x = 8 into either equation to solve for y. Let's use the first equation:
y = 3x - 1
y = 3(8) - 1
y = 24 - 1
y = 23
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7 ∊ D (f)
f(7) - f(-7) = ?
if f is an even function
Answer:
0
Step-by-step explanation:
if f is an even function, it means that:
f(x) = f(-x) for every x of the domain
So, because 7 is in f's domain, f(7) = f(-7),
and so f(7) - f(-7) = 0
Solve the separable differential equation, showing working out:
[tex]\frac{dy}{dx}=\frac{2y+4}{x}[/tex]
The solution of the given differential equation by using variable separable is [tex]y=\frac{x^2c}{2}-2[/tex]
An equation involving one or more functions and their derivatives is referred to as a differential equation in mathematics. The rate of change of a function at a particular moment is determined by the function's derivatives. It is mostly employed in disciplines like biology, engineering, and physics. The study of solutions that satisfy the equations and the characteristics of the solutions is the main goal of the differential equation.
The rules to solve differential equations using variables separable,
1) [tex]\frac{dy}{dx}=f(x)/f(y)[/tex]
2) separate terms with the same variable
f(y)dy=f(x)dx
3) Take integration on both sides
4) solve integration by using a suitable method
5) Then get the Solution of the differential equation.
The given differential equation is-
[tex]\frac{dy}{dx}=\frac{2y+4}{x}\\\\\frac{dy}{2y+4}=\frac{dx}{x}\\\\\int\frac{dy}{2y+4}=\int\frac{dx}{x}\\\\\frac{log(2y+4)}{2}=logx+logc\\log(2y+4)=2logxc\\2y+4=x^2c\\2y=x^2c-4\\y=\frac{x^2c}{2}-2[/tex]
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Math help . Find x in the picture please
Answer:
x = 7 ft
Step-by-step explanation:
[tex]tan 55=\frac{10}{x}\\x=\frac{10}{tan 55}\\x=7.0020\\x=7[/tex]
The hire purchase for motor bike is GHC 540.00, if this is to be paid in twenty equal monthly installments, what amount is paid each monthly installments
Answer:
The monthly installment for the hire purchase of the motorbike is GHC 27.00
Step-by-step explanation:
To calculate the monthly installment for the hire purchase, we can divide the total cost by the number of months:
Monthly installment = Total cost / Number of months
In this case, the total cost is GHC 540.00 and the number of months is 20:
Monthly installment = GHC 540.00 / 20
Monthly installment = GHC 27.00
Therefore, the monthly installment for the hire purchase of the motorbike is GHC 27.00
Samples of four people were asked whether gun laws should be more stringent. Respondents had a choice to answer "yes" or "no." The sampling distribution of the proportion of people who respond "yes" in the samples of 4 individuals is binomial because the number of people who respond "yes" has binomial distribution not possible to say because the sample size it too small not possible to say because population distribution is not known normal
According to the student question, the sampling distribution of the proportion of people who respond "yes" in the samples of 4 individuals is binomial because the number of people who respond "yes" has binomial distribution. The correct answer is A.
The sampling distribution of the proportion of people who respond "yes" in the samples of 4 individuals is binomial because the sample size is sufficiently small and each person's response is independent of the others.
Binomial distribution is used to model the number of successes in a fixed number of independent trials, where the probability of success is constant for each trial. In this case, the proportion of people who respond "yes" is the number of successes out of the total number of trials (i.e., 4 people).
Moreover, the responses of each individual are independent of each other, meaning that the probability of one person answering "yes" does not affect the probability of another person answering "yes." The correct answer is A.
Your question is incomplete but most probably your full question was
Samples of four people were asked whether gun laws should be more stringent. Respondents had a choice to answer "yes" or "no." The sampling distribution of the proportion of people who respond "yes" in the samples of 4 individuals is
a. Binomial because the number of people who respond "yes" has binomial distribution
b. Not possible to say because the sample size it too small
c. Not possible to say because population distribution is not known
d. Normal
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the mean daily production of a herd of cows is assumed to be normally distributed with a mean of 37 liters, and standard deviation of 4 liters. a) what is the probability that daily production is less than 44.4 liters? use technology (not tables) to get your probability.
The probability that daily production is less than 44.4 liters is 96.71%
According to the given data, the mean daily production of a herd of cows is assumed to be normally distributed with a mean of 37 liters and a standard deviation of 4 liters.
We need to calculate the probability that daily production is less than 44.4 liters using technology, not tables.Using technology, we can use the standard normal distribution formula to get the required probability.
We can use the standard normal distribution to calculate the probability that the daily production is less than 44.4 liters. To do this, we first need to standardize the variable:
z = (x - μ) / σ
where x is the value we are interested in, μ is the mean, and σ is the standard deviation.
Substituting the given values, we have:
z = (44.4 - 37) / 4 = 1.85
Using a standard normal distribution table or a calculator with a normal distribution function, we can find that the probability of a standard normal random variable being less than 1.85 is approximately 0.9671.
Different calculators may have slightly different ways to calculate normal probabilities. Here is an example using a TI-84 calculator:
Press the "2nd" key, then "Vars" to access the "Distr" menu.Select "normalcdf" from the menu.Enter the lower bound (-1E99 if it's negative infinity), the upper bound (44.4), the mean (37), and the standard deviation (4) in the appropriate fields. For this problem, you would enter normalcdf(-1E99, 44.4, 37, 4).Press "Enter" to calculate the probability. The answer should be approximately 0. 9671.Therefore, the probability that the daily production is less than 44.4 liters is approximately 0.9671, or 96.71% (rounded to two decimal places).
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A research scholar wants to know how many times per hour a certain strand of virus reproduces. He wants to construct the 90%
confidence interval with a maximum error of 0.16
reproductions per hour. Assuming that the mean is 6.2
reproductions and the variance is known to be 5.29
, what is the minimum sample size required for the estimate? Round your answer up to the next integer.
The minimum sample size required for the estimate, considering the z-distribution, is given as follows:
560.
What is a z-distribution confidence interval?The bounds of the confidence interval are given by the rule presented as follows:
[tex]\overline{x} \pm z\frac{\sigma}{\sqrt{n}}[/tex]
In which:
[tex]\overline{x}[/tex] is the sample mean.z is the critical value.n is the sample size.[tex]\sigma[/tex] is the standard deviation for the population.The margin of error is modeled as follows:
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
The parameters for this problem are given as follows:
[tex]M = 0.16, \sigma = \sqrt{5.29} = 2.3, z = 1.645[/tex]
Hence the sample size is obtained as follows:
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
[tex]0.16 = 1.645\frac{2.3}{\sqrt{n}}[/tex]
[tex]0.16\sqrt{n} = 1.645 \times 2.3[/tex]
[tex]\sqrt{n} = \frac{1.645 \times 2.3}{0.16}[/tex]
[tex](\sqrt{n})^2 = \left(\frac{1.645 \times 2.3}{0.16}\right)[/tex]
n = 560. (rounded up).
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what is the value of the expression
v/2 +(3/4 +w)
when v=1 and w= 5/8
a 1/8
b 3/8
c 5/8
d 1
The value of v/2 +(3/4 +w) when v = 1 and w = 5/8 is 1 7/8
What is substitution of variables?substitution of variables is a basic technique used to simplify problems in which the original variables are replaced with functions of other variables.
Since V = 1 and W = 5/8, by substituting 1 for V and 5/8 for w in the expression
v/2 +(3/4 +w) = 1/2+ ( 3/4 + 5/8)
= 1/2 + (6+5)/8
= 1/2 + 11/8
= (4+11)/8
= 15/8
= 1 7/8
Therefore the value of v/2 +(3/4 +w) when v is 1 , and w is 5/8 is 1 7/8
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two step equation
find the value in the eqaution
4/q (q-10)=8
The solution q = -10 does not satisfy the original equation. Therefore, there is no solution to the equation.
What are equations?
A mathematical definition of an equation is a claim that two expressions are equal when they are joined by the equals sign ("="). For illustration, 2x - 5 = 13. 2x - 5 and 13 are expressions in this case. These two expressions are joined together by the sign "=".
To solve the equation [tex]\frac{4}{q}(q-10) = 8[/tex] we can begin by simplifying the left side of the equation:
[tex]\frac{4}{q}(q-10) = 8[/tex]
[tex]\Rightarrow \qquad 4(q-10) = 8q \text {multiply both sides by }q[/tex]
[tex]\Rightarrow \qquad 4q - 40 &= 8q && \text{distribute }4 \\\\\Rightarrow \qquad -40 &= 4q && \text{subtract }4q\text{ from both sides} \\\\\Rightarrow \qquad -10 &= q && \text{divide both sides by }-4.\\\end{align*}[/tex]
Therefore, the solution to the equation is q= -10. We can check our answer by plugging q= -10 back into the original equation:
[tex]\frac{4}{q}(q-10) &= 8 \\\\\\\Rightarrow \qquad \frac{4}{-10}(-10-10) &= 8 && \text{substitute }q=-10\\\\\\\Rightarrow \qquad -\frac{4}{5} \cdot (-20) &= 8 \\\\\\\Rightarrow \qquad 16 &= 8\end{align*}[/tex]
Since the last equation is false, the solution q = -10 does not satisfy the original equation. Therefore, there is no solution to the equation.
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what if circumference of circular table having diameter 'd 'mater? find it
Rhombus JKLM with vertices J(-10, 2), K(-2, 8), L(6,2), and M(-2, -4): k = ¹/2
3.What is the measure of angle d₁º?
4.What is the tangent ratio of angle c₂?
Step-by-step explanation:
remember answer 2.
3. I answered already in my other answer.
remember, the diagonals split the angles in half.
so,
d1 = 50°
4. the tangent ratio is sine/cosine (that is the definition of tangent).
c2 = 40°
sin(40) × 5 = OD (half of BD)
cos(40) × 5 = OC
the tangent ratio is
(sin(40) × 5) / (cos(40) × 5) = sin(40)/cos(40) = OD/OC =
≈ 3.2 / 3.8 = 1.6/1.9 =
= 0.842105263...
control : tan(40) = 0.839099631... close enough (we used round numbers with 3 2 and 3.8 - see again 1. and 2.).
i need to know the answer
area of trapezium is 30 in².
Define trapeziumA trapezium is a four-sided geometric figure that has only one pair of parallel sides. It is also known as a trapezoid in some countries. The parallel sides of a trapezium are called the bases, and the non-parallel sides are called the legs. The height (or altitude) of a trapezium is the perpendicular distance between the two bases.
The area of a trapezium is given by the formula:
A =½(a×b)h
where "a" and "b" are the lengths of the parallel sides of the trapezium, and "h" is the height (or perpendicular distance) between the parallel sides.
Length of two parallel side
a=7.7in
b=2.3in
Height of trapezium, h=6in
Area of trapezium=½(a×b)h
=½(7.7+2.3)×6
=3×10
=30in²
Hence, area of trapezium is 30 in².
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How do debt payments relate to gross income in terms of the debt-to-income (DTI) ratio?
O total gross income is divided by total debt payments
total debt payments are subtracted from total gross income
total gross income is added to total debt payments
total debt payments are divided by total gross income
Debt payments relate to gross income in terms of the debt-to-income (DTI) ratio by total debt payments are divided by total. gross income.
How do debt payments relate to gross income?
The debt-to-income (DTI) ratio is a financial measurement used by lenders to assess a borrower's ability to manage debt payments. It is calculated by dividing the borrower's total debt payments by their total gross income. The resulting ratio is expressed as a percentage and indicates the portion of the borrower's income that goes towards paying their debt obligations.
For example, if a borrower has total debt payments of $1,000 per month and a gross income of $4,000 per month, their DTI ratio would be 25% ($1,000 divided by $4,000). A lower DTI ratio indicates that a borrower has more disposable income available after paying their debts and is generally viewed as a positive factor by lenders when considering a borrower for a loan or credit.
So, correct option is total debt payments are divided by total gross income.
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Answer:
D. total debt payments are divided by total gross income
Step-by-step explanation:
D. total debt payments are divided by total gross income
er
A keyboarding instructor at a community
college collected data comparing a
student's age and their typing speed.
The equation for the line of best fit is
given as y=-1.4x + 117.8, where x is the
"age in years" and y is the "typing speed.
If you are 25 years of age, what is your
typing speed?
If you are 25 years of age, your typing speed is equal to 82.8 units.
What is a line of best fit?In Mathematics, a line of best fit is sometimes referred to as a trend line and it can be defined as a statistical or analytical tool that is typically used by researchers and mathematicians in conjunction with a scatter plot, in order to determine whether or not there is any form of association and correlation between a data set.
Based on the scatter plot, we can logically deduce that an equation which represents the line of best fit include the following:
y = -1.4x + 117.8
When you are 25 years of age, your typing speed can be calculated as follows;
y = -1.4x + 117.8
y = -1.4(25) + 117.8
y = -35 + 117.8
y = 82.8 units.
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PLEASE ANSWER USE PEMDAS
What is the correct mathematical description of the expression (14.8 ÷ 2) + 6 x 3 − 12?
14 and 8 tenths divided by 2 plus 6 times 3 minus 12
14 and 8 tenths divided by 2 plus 6 times the difference of 3 minus 12
The quotient of 14 and 8 tenths divided by 2 plus six times 3 minus 12
The quotient of 14 and 8 tenths divided by 2 plus the product of 6 and 3 minus 12
Answer: D or the Fourth Choice-The quotient of 14 and 8 tenths divided by 2 plus the product of 6 and 3 minus 12
PEDMAS means Parentheses, Exponents, Divide, Multiply,Add,Subtract. The first thing we must solve is what is in the parentheses, that is 14.8 divided by 2. We don't have any exponents, so we move to divide. We have already solved the division sentence that was in the parentheses, so we have to multiply 6x3 next. 6x3 will then be added to the answer that was divided by 14.2 and 2, and lastly we will subtract 12. The only answer choice that follows that pattern is D or The quotient of 14 and 8 tenths divided by 2 plus the product of 6 and 3 minus 12.
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The mean of 3, 15, and my number is 40. What is my number?
We can start by using the formula for the mean (average):
Mean = (sum of numbers) / (number of numbers)
We are given that the mean of 3, 15, and another number is 40, so we can set up an equation:
40 = (3 + 15 + x) / 3
Multiplying both sides by 3 yields:
120 = 3 + 15 + x
Simplifying this equation gives:
102 = x
Therefore, the missing number is 102.