Calculate the area of a circle with a radius of 2.3 cm.

Answers

Answer 1

Answer:

16.62 cm²

Step-by-step explanation:

A = πr² is the appropriate equation here.

If r = 2.3 cm, then A = π(2.3 cm)² = 16.62 cm²


Related Questions

use triangle ABC with vertices A (3,4) B(1,6) and C(1,1). translate triangle ABC 5 units left and 3 unts down whats the B coordinate ​

Answers

Answer:

(6,3).    P

Step-by-step explanation:

 Hello there my friend ;D  

When we are talking about translation, it is really simple. Let me simplify it for you with the formulas. When they are asking you do move left or right, that means the x coordinate will moved (‘a’ will be the units they ask you to move) If they are asking you to move LEFT: (x,y)   —> (x-a, y). If they are asking you to move RIGHT: (x,y) —> (x+a, y).  Now if they are asking you to move up or down, that mean the y-coordinate will move (‘b’ will be the units they ask you to move) If they ask you to move UP: (x,y) —> (x, y+b).  If they ask you to move DOWN: (x,y) —> (x, y-b).   NOW, In our current problem, they are asking what is  B’ coordinate, B was (1,6). B will be translated 5 units LEFT and 3 units DOWN.  Now that I have already explained, (1+5, 6) —-> (6, 6). (Note: ALWAYS do x before y).     Then (6, 6-3) —> (6, 3).    SO, the answer is (6,3).

I HOPE THIS HELPED!! HAVE A GREAT DAY ;D  PLEASE GIVE ME BRAINLIEST!!

4. The graph shows a nonlinear function.

4a. Write the equation of a second function that has a constant rate
of change of 0 and passes through (2, 1). What does its graph
look like?

4b. What is the difference in outputs of the two functions at x = 0? Explain.

4c. How many times do the graphs of the functions intersect? Explain.
d. For inputs between 1 and 0.5, which function has greater outputs? Explain.

4d. For inputs between -1 and 0.5, which function has greater outputs? Explain.

Answers

Answer:

A linear function is a special type of function whose graphs are straight lines (as their name suggests). Let’s look at a straight line and find out what this particular shape of graph tells us about the relationship between the input  and the output  of a linear function.

Step-by-step explanation:

pls mark as brainliest

Find my number, if the product of my number and 3 is 15 more than the sum of my number and 3

Answers

Answer:

9

Step-by-step explanation:

let the number be X

x multiplied by 3 will be equal to 15 + X + 3

3x = 18+X

2x = 18

x = 9

Answer:

9

Step-by-step explanation:

what is the least common denominator 5/8 and 3/4

Answers

Answer:

The least common denominator is 8, you need to multiply the 3 by 2.

Answer:

8

Step-by-step explanation:

How much does a cat way on the moon

Answers

Answer:

Since weight is directly dependent on the acceleration of gravity, things on the Moon will weigh only 16.6% (≈ 1/6) of their weight on Earth.

Step-by-step explanation:

Being that the moon has a gravitational force of 1.622m/s2, we multiply the object's mass by this quanitity to calculate an object's weight on the moon. So an object or person on the moon would weigh 16.5% its weight on earth. Therefore, a person would be much lighter on the moon.

have a nice day /night\

may i please have a branlliest

Given f(x) = 6(1-x), what is the value of f(-5)?

Answers

f(x)=36

Explanation:
when you plug -5 in place of x into the equation, you are left with 6(1-(-5)). Since subtracting a negative is the same as adding a positive, we know that 1+5=6 which leave us with 6(6) which is 36.

Hope that helps! :)

help ! work needs to be shown on both (both, all three, however you’d like to refer it as)

Answers

Answer:

13= 89%

Step-by-step explanation:

89/100= .89= 89%

Answer:

13. 89%

14. 1/10 to each friend

Step-by-step explanation:

13. 89/100 = 0.89 -> 89%

100%/10 friends = 10% per friend, so 1/10 of the cake goes to each friend.

Fredrick can use decims as 0.1, as 0.1 of the cake goes to each friend.

Solving Systems: Graphing Method
y = 4x+6
2x-3y=1

Answers

Answer:

vjgioio

Step-by-step explanation:

Answer:

Therefore x= -1.9

y= -1.6

help me with this question, please, ill choose brainiest and give u 30 points for answering
image below

Answers

Answer: D

Step-by-step explanation:

What is the x-coordinate of the solution to the system shown?

3x - y = 6
3x + y = 34

Answers

Answer:

6[tex]\frac{2}{3}[/tex]

Step-by-step explanation:

In this equation I will do the elimination method.

3x-y=6

3x+y=34

6x=40

Simplify

x=6[tex]\frac{2}{3}[/tex].

Check:

3(6.666...)-y=6

20-y=6

-20 from 6

-y=-14

y=14

20-14=6

6=6

3x(6.666...)+y=34

20+14=34

34=34

To begin, we can convert the equations into slope-intercept form:

3x - y = 6 → y = 3x - 6

3x + y = 34 → y = -3x + 34

Next, we plug it in to become an equation with variables on both sides:

3x - 6 = -3x + 34

→ 6x - 6 = 34

→ 6x = 40

→ x = 6 2/3 OR 6.66666

Jennifers math score for third quarter were 78, 89, 93, 73, 99, 87, 92, and 89 what is the range of her scores

Answers

Answer:

26

Step-by-step explanation:

range = [highest number] - [lowest number]

99-73=26

brainy plot and labels points P (-5/2), Q (2 3/4), R(1.25), and S(-3.5) on the number line

Answers

Answer:

Step-by-step explanation:

To plot points P (-5/2), Q (2 3/4), R(1.25), and S(-3.5) on a number line, we can simply draw a horizontal line and mark off the positions of the points. The numbers on the number line will represent the values of the x-coordinates of the points.

[asy]

unit size(1cm);

draw((-7,0)--(5,0));

draw((-7,0)--(-7,1)--(5,1)--(5,0)--cycle);

dot("$P$", (-5/2,0), S);

dot("$Q$", (2 3/4,0), S);

dot("$R$", (1.25,0), S);

dot("$S$", (-3.5,0), S);

[/asy]

On the number line, point P is located at -5/2, point Q is located at 2 3/4, point R is located at 1.25, and point S is located at -3.5.

Compute the smallest base-10 positive integer greater than 5 that is a palindrome when written in both base 2 and 4.

Answers

The smallest base-10 positive integer greater than 5 that is a palindrome when written in both base 2 and 4 is 11.

To compute this, first convert 5 to binary and base-4:

5 in binary: 101

5 in base-4: 11

Since 11 is the same in both bases, the next number that would be a palindrome in both bases is 11.

To find the base 10 number of this palindrome, we convert 11 from binary and base-4 to base 10:

11 in binary: 1011

11 in base-4: 111

Therefore, the smallest base-10 positive integer greater than 5 that is a palindrome when written in both base 2 and 4 is 11.

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Consider the following 8 numbers, where one labelled x is unknown. 28, 39, 21, x , 33, 38, 2, 45 Given that the range of the numbers is 57, work out 2 values of x

Answers

The needed two values of x are: 59 and -12.

The difference between a sequence's maximum value and minimum value is referred to as the sequence's range.

A sequence's range is just a set that identifies the sequence. The set x1, x2, x3, and so forth is typically used to describe the range; it is also written as xn; n = 1, 2, 3,...

Given sequence of 8 numbers as: 28, 39, 21, x , 33, 38, 2, 45

Given range of above sequence: 57

Since the value x can assume any value, it have option to be minimum value in the sequence or maximum value in the sequence such that  the range remains at 57.

Case 1: x as minimum value of given sequence:

If so, then the maximum value is 45. Then-

range = maximum value - minimum value

57 = 45 - x

x = -12

Case 2: x as maximum value of the given sequence:

If so, then the minimum value of the sequence is 2. Then-

range = maximum value - minimum value

57 = x - 2

x = 59

Thus, the needed two values of x are: 59 and -12.

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Select all ratios equivalent to 2:14. A3:21b.1.2.c
16:112

Answers

The ratios equivalent to 2:14 are 3:21 and 16:112. Option A &C

What is equivalent ratios?

Equivalent ratios are the ratios that are the same when we compare them. Two or more ratios can be compared with each other to check whether they are equivalent or not. For example, 1:2 and 2:4 are equivalent ratios.

2:14 = 2/14

Reducing 2/14 to the lowest terms = 1/7

2:14 is equivalent to 1:7

3:21 = 3/21 = 1/7

Reducing 3/21 to the lowest terms = 1/7

3:21 is equivalent to 1:7

1:2 = 1/2

1:2 is not equivalent to 1:7

16:112 = 16/112 = 1/7

Reducing 16/112 to the lowest terms = 1/7

16:112 is equivalent to 1:7

Hence, 2:14, 3:21 and 16:112 are all equivalent ratios

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Complete the square to write each equation in vertex form. Then, state whether the vertex is a minimum or a maximum and give its coordinates.

Answers

Answer:

a) y(x) = (x + 2)^2 -2

b) minimum

c) (-2, -2)

Answer:

see explanation

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

• If a > 0 then vertex is minimum

• If a < 0 then vertex is maximum

Given

y = x² + 4x + 2

(a)

To complete the square

add/ subtract ( half the coefficient of the x- term)² to x² + 4x

y = x² + 2(2)x + 4 - 4 + 2

y = (x + 2)² - 2

(b)

Since a = 1 > 0 then vertex is minimum

(c)

(h, k ) = (- 2, - 2 ) ← coordinates of vertex

The table shown represents a linear relationship. x 0 1 3 4 y −8 −6 −2 0 Based on the table, what is the equation of the linear relationship in slope-intercept form? y = 2x − 8 y = 2x + 8 y = −2x + 4 y = −2x − 4

Answers

Based on the table, an equation of the linear relationship in slope-intercept form include the following: A. y = 2x − 8

What is the slope-intercept form?

Mathematically, the slope-intercept form of a line can be calculated by using this equation:

y = mx + c

Where:

m represents the slope.x and y are the data points.c represents the y-intercept.

Next, we would determine the slope of the data points in this table as follows;

Slope, m = (Change in y-axis, Δy)/(Change in x-axis, Δx)

Slope, m = (y₂ - y₁)/(x₂ - x₁)

Slope, m = (-6 - (-8))/(1 - 0)

Slope, m = 2/1

Slope, m = 2.

At point (0, -8), an equation of this line can be calculated in slope-intercept form as follows:

Note: The y-intercept is equal to -8.

y = mx + c

y = 2x + (-8)

y = 2x - 8.

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Answer:

A. y = 2x − 8

Step-by-step explanation:

3(x−1) + 7=11 what is x

Answers

Answer:

3(x-1)+7=11

3x-3-7=11

3x-10=11

3x=11+10

x=21/3

x=7

Step-by-step explanation:

Answer:

[tex]3(x−1) + 7=11[/tex]

[tex]3x−3+ 7=11[/tex]

[tex]3x + 4 = 11[/tex]

[tex]x = \frac{7}{3} [/tex]

Someone help please hurry !!! ASAP

Answers

Answer:

it's -4

Step-by-step explanation:

hope it helped!!!!!!

Answer:

-4

Step-by-step explanation:

The answer will be the same as a positive square root, just add a negative.

35 PTS. Don’t explain. y=?

Answers

Answer:

180-25-60=95

Step-by-step explanation:

Y=35
Becuase 120 + 25 = 145
180-145=35

which operation should be completed first to find the value of the expreesion below 12 + 30 / (6 -3) + 1

Answers

Subtraction (6-3) in parentheses should be first

Does anybody know what the answer to this question?

Answers

The simplified form of the given fraction is, [tex]\frac{1}{x^2y}[/tex].

What is simplified form of the expression?

If a fraction's top and bottom have only the number one in common, then it is expressed in its simplest form. The top and bottom cannot be divided further and remain whole numbers, in other words. The phrase "lowest terms" is another term for the simplest form.

Consider, the given expression

[tex]\frac{(\frac{1}{x^2}-\frac{2}{y} )}{y-2x^2}[/tex]

We have to find the simplified form of the given expression.

Taking cross multiplication of numerator of the above fraction.

[tex]\frac{(\frac{y-2x^2}{x^2y} )}{y-2x^2}[/tex]

Using: [tex]\frac{(\frac{a}{b} )}{c} = \frac{a}{b}*\frac{1}{c}[/tex]

⇒  [tex]\frac{(\frac{y-2x^2}{x^2y} )}{y-2x^2} = \frac{y-2x^2}{x^2y} *\frac{1}{y-2x^2} = \frac{1}{x^2y}[/tex]

Hence, the simplified form of the given fraction is, [tex]\frac{1}{x^2y}[/tex].

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A square and an equilateral triangle are joined to form the polygon shown what is the sum of the interior angles of the polygon 240 degrees 360 degrees 420 degrees 540 degrees

Answers

Answer:

540°

Step-by-step explanation:

An equilateral triangle has 3 interior angles of 60°

A square has 4 interior angles of 90°.

When the images are joined, two vertices of each figures are joined together, such that these angles will have now a measure of:

60° + 90° = 150°

Then this figure has:

one angle of 60°

two angles of 150°

and two angles of 90°

(the image below illustrates this situation)

The sum of the interior angles is:

S = 60° + 2*150° + 2*90° = 540°

Help Me Now!!!
need help with b c and d

Answers

Answer:

b) Take the current height, and add up 15.

c) y = 80x + 15

where y is the height of the water in the pool, in centimeters

where x is the time since the hose is in the pool, in hours

d) 180 = 80x + 15

165 = 80x

x = 165/80 = 2.0625 hours, which is also 2 hours and 3 minutes.

F39) if x## is defined as x## = x² - x for all values of x, and A## = ( A - 2 )##, then what is the value of A?

Answers

The value of A in A## = ( A - 2 )## if x## = x² - x is 2 Or 3.

What are coding and decoding?

Topics in the reasoning part include coding, decoding, and reasoning. One of the most frequently occurring portions in all of the important competitive exams specifically created for employment procedures and higher education is this one. Because Coding-Decoding and Reasoning problems can be difficult for some applicants to complete, they avoid them and lose some quick and simple marks.

Given, x## is defined as x## = x² - x.

Therefore,

A## = (A - 2)##

= (A - 2)² - (A - 2).

= A² - 4A + 4 - A + 2.

= A² - 5A + 6.

Let, A² - 5A + 6 = 0.

A² - 3A - 2A + 6 = 0.

A(A - 3) - 2 (A - 3) = 0.

(A - 3)(A - 2) = 0.

A = 3 Or A = 2.

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What value of n makes the equation true? Show your work.

Answers

Answer:

4

Step-by-step explanation:

[tex](7^5*7^n)^4 = (\frac{7^{16}}{7^n})^3[/tex]

[tex]7^{20}*7^{4n} = \frac{7^{48}}{7^{3n}}[/tex]

[tex]7^{7n} = \frac{7^{48}}{7^{20}}[/tex]

[tex]7^{7n} = 7^{28}\\[/tex]

[tex]n = 4[/tex]

im so bad at this help plss

Answers

This is a common type of problem you will get a lot in middle school with some steps I’ll walk you through.

1. To start off, go ahead and point that coordinate the line needs to pass through with an x value of -2 and a y value of -4.
2. Then, look at your slope: -1/2. The - automatically tells you that your slope is going to be from a higher left to a lower right.
3. The -1/2 in your slope tells you that for every 1 unit drop in y value, move your x along to the right by 2 units.
4. With this rule, apply it to the dot you just drew. For instance, one point would be (0,-5) because x increased two as y decreased by one.
5. You will eventually have a series of dots that you can draw the line through. You can even feel free to erase all the little dots you drew (except -2,-4) if you want the line to look nicer.

You got this! :D

Reason Abstractly Determine if the
statement is true or false. Justify your
response.
The point (1, r) on the graph of a proportional
relationship shows the unit rate r.

Answers

Yes, the statement is true. If a proportional relation has the point (1, r), then r is the unit rate.

Is the statement true or false?

Here we have the following statement:

"The point (1, r) on the graph of a proportional relationship shows the unit rate r."

First, remember that a proportional relationship between two variables x and y can be written as:

y = k*x

There k is what we call the constant of proportionality or the unit rate.

If we evaluate that equation in x = 1, we will get:

y = k*1

y = k

Then we have the point (1, k).

In this case, we know that our proportional relation has the point (1, r), comparing this with the case above, we can see that r is the unit rate of the proportional relation.

So the statement is true.

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Complete the equation of the line who’s y intercept is (0,-1) and slope is 4

Answers

Y=4x-1

The equation of a line is:

Y=mx+c

We are told that the slope is 4 which is also gradient, meaning that M=4

Now we are left with:

Y=4x+c

There are two ways to get C:

1. We know that C represents the y-intercept so immediately we can conclude that C=-1

2. You can work it out by substituting the coordinate for the X and Y value:

-1=4(0)+c

-1=C

So in conclusion, the equation of the line is:

Y=4x-1

select the equation that represents the problem let x represent the unknow number
principal Hernandez bought 640 t shirts for the students in his school the t-shirts came in packs of 20.how many packs did he buy
A. x + 20= 640
B. 640x= 20
c. 20x= 640
D. 640 - x = 20

Answers

The correct answer is C
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