elena bikes 20 minutes each day for exercise write and equation to describe the relationship between her distance in miles d and her biking speed in miles per hour when she bikes at a constant speed of 15 miles per hour for the first 5 minutes then at 12 miles per hour for the last 15 minutes

Answers

Answer 1
Answer:
The equation to describe the relationship between Elena distance:
a) D = 4.34 miles, b) D = 4.25 miles and c) 12D = M + 3N miles.
Solution:
Given, Elena bikes 20 minutes each day for exercise.
We have to write an equation to describe the relationship between her distance in miles, D, and her biking speed, in miles per hour,
We know that, distance travelled = speed time
a. At a constant speed of 13 miles per hour for the entire 20 minutes
Her speed is 13 miles per hour.
Then, distance D miles = 13 miles per hour 20 minutes

b. At a constant speed of 15 minutes per hour for the first 5 minutes, then at 12 miles per hour for the last 15 minutes
Now, total distance travelled = distance travelled with 15 mph + distance travelled with 12 mph

c. At a constant speed of M miles per hour for the first 5 minutes, then at N miles per hour for the last 15 minutes
Now, total distance travelled = distance travelled with M mph + distance travelled with N mph



Hence, a) D = 4.34 miles, b) D = 4.25 miles and c) 12D = M + 3N miles.

Related Questions

In the expression, 9x3 + 4x2 + 7x + 6, what is the constant?
6
ооо
O4

Answers

Answer:

6

Step-by-step explanation:

The constant is the number that is on its own, the number that has no variable.

The only number that has no variable is 6 therefore the constant is 6.

Note: the variable is usually expressed as a letter, ex. in 9x the variable is "x"

Answer:

The constant term is [tex]6[/tex].

Step-by-step explanation:

Given that,

An expression,[tex]9x^3 + 4x^2 + 7x + 6[/tex].

To find,

The constant term.

Solution,

We have,

An expression, [tex]9x^3 + 4x^2 + 7x + 6[/tex]

The term that doesn't have any variable is the constant term of an expression.

The coefficient of [tex]x^3[/tex] is 9.

The coefficient of [tex]x^2[/tex] is 4.

The coefficient of [tex]x[/tex] is 7.

The constant term is 6 as it doesn't contain any variable.

Hence, the constant term is [tex]6[/tex].

Reference,

https://brainly.com/question/18775522

Write 3.7777... As a mixed number

Answers

Answer:

3  7777/10000

Step-by-step explanation:

Answer:

[tex]3\frac{7}{9}[/tex]

Step-by-step explanation:

[tex]3.777...=3+0.777...[/tex]

[tex]0.777...=x\\7.777...=10x[/tex]

[tex]10x-x=7.777...-0.777...\\9x=7\\x=\frac{7}{9}[/tex]

The answer is [tex]3\frac{7}{9}[/tex]

Pringle's variety pack 18 cups for $6.48 cost per cup

Answers

Answer:

0.36

Step-by-step explanation:

Which answer choice correctly shows 564 written as a Roman numeral? A.DLXIN B.DLXIIII C.DXLIV D.MLXIV​

Answers

Answer:

DLXIV.   I don't see that as any of the answer choices, so maybe you put some of them in wrong.

Step-by-step explanation:

D is 500

LX is 60

IV is 4

I hope this helps!  

pls ❤ and mark brainliest pls!

(a) Write these in order of size starting with the smallest 0.8 78% ⅞ 0.71​

Answers

Answer:

0.71, 78%, 0.8, [tex]\frac{7}{8}[/tex]

Step-by-step explanation:

78% = 0.78

7/8 = 0.875

Identify the independent and dependent variables a store is having a sale over Labor Day weekend. The more purchases, the greater the profits

Answers

9514 1404 393

Answer:

independent: purchasesdependent: profits

Step-by-step explanation:

The relationship description tells you that profits depend on purchases. Therefore, profits are the dependent variable; purchases are the independent variable.

Picture shown!

If f(x) = x^2, and
g(x) = x - 1, then
g(f(x)) = x^[?]+[?]

Answers

Answer:

g(f(x)) = x^2 + 1

? = 2

grey box = 1

Step-by-step explanation:

Answer:

g(f(x)) = [tex]x^{2}[/tex] + 1

Solve:
p -23 = 23
A. p = 24
B. p = 46
C. p = 52
D. p = 44

Answers

Answer:

The answer is B. p= 46

Step-by-step explanation:

23+23=46-23=23

Answer:

your answer is B

Step-by-step explanation:


WILL MARK BRAINLIEST: In a car park, 2/3 of the cars are red.
1/5 of the cars are blue.
What fraction of the cars are red or blue?

Answers

Answer:

13/15

Step-by-step explanation:

Answer:13/15

Step-by-step explanation:

2.
Graph the set of points. Which model is most appropriate for the set? (–6, –1), (–3, 2), (–1, 4), (2, 7)

A. linear
B. exponential
C. quadratic

Answers

Answer:

A. linear

Step-by-step explanation:

Please find the value of x

Answers

Answer:

[tex]2x - 10 = 3x - 40 \\ x \: terms \: togather \\ 3x - 2x = - 1 0 + 40 \\ x = 30 \\ thank \: you[/tex]

If I start at 6:05 and end at 8:30. How much time is that.

Isn’t is 2 hours and 25 minutes or 2 hours and 35 minutes?

Answers

Answer:

Isn’t is 2 hours and 25 minutes

Step-by-step explanation:

[tex]8:30 - 6:05 = 2:25[/tex]

I hope I helped you^_^

2 hours and 25 minutes

If CP=Rs. 1200 and loss =10%, find loss amount.​

Answers

Answer:

lost 120

Step-by-step explanation:

10% of 1200 is 120 so you subtract 120 from 1200

Answer:

120

Step-by-step explanation:

Loss = (Loss%)(C.P)

Loss = (10%)(1200)

Loss = (10/100)(1200)

Loss = 120

What is greatest common factor of 54ab and 54ab to the power of 2

Answers

Answer:

54ab

Step-by-step explanation:

the only two factors of 54ab^2 and 54ab is 1 and 54ab and the greatest of that would be 54ab.

3. I Need Help Please
Match the graph of the function with the function rule.


A. y = 3 • 2^x

B. y = 4 • 3^x

C. y = 2 • 3^x

D. y = 1 • 3^x

Answers

Answer:

D. y = 1 • 3^x

Step-by-step explanation:

Exponential functions have a horizontal asymptote. The equation of the horizontal asymptote is  

y

=

0

.

Horizontal Asymptote:  

y

=

0

What is the slope of any line that is perpendicular to y=1- x?

Answers

Answer:

y = x + 1

Step-by-step explanation:

y = -x + 1

y = x + 1

Solve 15x squared + 40x

Answers

Answer:

265x{2} + 40x

Step-by-step explanation:

Squared mean to multiply the number times itself. So 15x times 15x.

[tex]15x^{2} = 225x[/tex]{2}

Then the problem says to add, but because one is squared and th other is not, they cannot be combined. So the answer is:

[tex]225x{2} + 40x

Answer:

see below

Step-by-step explanation:

15x^2 + 40x

These are not like terms so they cannot be combined.

If you mean

(15x) ^2 + 40x

(15x * 15x) + 40x

225x^2 + 40x

They are still not like terms so they cannot be combined.

1 point Final grades are often computed using weighted averages. Some college professors use complicated weighted averages . Your college professor tells you he will give a 33%-67% split on grades between tests and homework where whichever average is higher will be the 67%. What will your final grade be if your homework average is 59 and your test average is 64? ​

Answers

Weighted average is the average of a set using different weight for each element in the set. The final grade when homework and test scores are 59 and 64 is 62.35

Given that:

[tex]Homework = 59[/tex]

[tex]Test = 64[/tex]

The test score is greater than the homework score. So, the test will be weighted using 67%, while the homework will be weighted using 33%.

The final grade is calculated as follows:

[tex]Grade = 67\% \times Test + 33\% \times Homework[/tex]

So, we have:

[tex]Grade = 67\% \times 64 + 33\% \times 59[/tex]

[tex]Grade = 42.88 + 19.47[/tex]

[tex]Grade = 62.35[/tex]

Hence, the final grade is 62.35

Read more about weighted average at:

https://brainly.com/question/18554478

If y varies inversely as x and y= 2/5 when x= 2, find y when x= 1 equation

Answers

Answer:

4/5

Step-by-step explanation:

y=k/x

2/5=k/2

cross multiply

5k=4

k=4/5

substitute 4/5 for k

y=4/5/x

y=4/5/1

y=4/5

You have a cup with 19 coins inside. The total inside the cup is $1.30. Determine how many nickels and dimes are inside the cup. Use a system of equations. Be sure to defined the variables and show all your work. PLS HELP!

Answers

Answer:

7 dimes and 12 nickels.

Step-by-step explanation:

12 nickels = $0.60 and 7 dimes = $0.70. $0.70 + $0.60 = $1.30.

Please help! This is due soon!!!
Write a function that has roots at x=2,6.

Answers

Answer:

x^2-8x+12

Step-by-step explanation:

(x-2)(x-6) roots= 2,6

x^2-6x-2x+12

=x^2-8x+12

How would I prove the congruency of these triangles?

Answers

Step-by-step explanation:

the radius cuts the segment into two equal parts because it is perpendicular to the chord

Answer:

Step-by-step explanation:

As O is the mid point of the circle

Similarly, B also becomes the mid point of the line AC.

So, line OB divides AB and BC equally.

Hence, lines AB = AC, but they are asking to prove congruency of triangles.

So, u have to join OA and OC.

Same way,   line OB divides ∠OBA and ∠OBC.

So it is proved that AB = AC

Perry currently has $180 dollars and is spending $6 per day. Nick has no money
but is earning $8teach day. After how many days will they have the same
amount of money?

Answers

Answer:

After 13 days (Rounded) If you dont round it's [tex]\frac{90}{7}[/tex] or 12[tex]\frac{6}{7}[/tex]

Step-by-step explanation:

Perry: 180 - 6x = 8x

180 - 6x + 6x = 8x + 6x

180 = 14x

180/14 = 14x/14

90/7 = x

What is the cost of 1.5 kg of apples at $2.98 per kilogram?

Answers

Rate per kg=2.98Rate at 1.5kg

[tex]\\ \rm\Rrightarrow 2.98\times 1.5[/tex]

[tex]\\ \rm\Rrightarrow 2.98\times \dfrac{3}{2}[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{8.94}{2}[/tex]

[tex]\\ \rm\Rrightarrow 4.47[/tex]

4. 1 less than twice the square of a number

Answers

Answer:

2(x^2)-1

Step-by-step explanation:

The square of a number is just the number squared. We don't know what the number is so I will just say it is x. So we have 2 times x^2. Then we have to minus 1 from that. So 2(x^2)-1.

Hope this helps! :D

The expression "1 less than twice the square of a number" can be represented mathematically as [tex]\(2x^2 - 1\)[/tex], where x is the variable representing the number.

Expression: [tex]\(2x^2 - 1\)[/tex]

Step 1: Square the number x:

[tex]\((x)^2 = x^2\)[/tex]

Step 2: Multiply the squared number by 2:

[tex]\(2 \cdot x^2 = 2x^2\)[/tex]

Step 3: Subtract 1 from the result of step 2:

[tex]\(2x^2 - 1\)[/tex]

This is the final expression that represents "1 less than twice the square of a number."

For example, if we substitute a specific value for x, let's say x = 3:

Step 1: Square the number: [tex]\(3^2 = 9\)[/tex]

Step 2: Twice the squared number: [tex]\(2 \cdot 9 = 18\)[/tex]

Step 3: Subtract 1: 18 - 1 = 17

So, when x = 3, the expression [tex]\(2x^2 - 1\)[/tex] evaluates to 17.

To know more about square, refer here:

https://brainly.com/question/14123715

#SPJ3

Click the links to open each of the documents below. These documents contain instructions for completing the assignment. Once you have created your file(s) and are ready to upload your assignment, click the Add Files button below and select each file from your desktop or network folder. Upload each file separately.

Your work will not be submitted to your teacher until you click Submit.

Answers

Answer:

what link because I am unable to find one here please ensure to include the link

Answer:

How can Mass and Speed Influence KE?

The goal of this experiment was to determine how mass and speed influence KE. This is significant because you would know whether to add more or less mass/speed if you were in a position where you required something to move higher. We filled the bean bag with a set amount of water, then dropped it to see how much mass it had. After that, you kept track of how high the bean bag went. The same thing happened with the speed, but the amount of liquid in the bottle was the same; it was just dropped from different heights. My theory is that the KE will increase as mass increases. This is also true of speed; if the bean bag is dropped from a higher altitude, it will launch farther than before.

The data I gathered in the lab confirmed my hypothesis. When the bottle's height was increased, the bean bag rose higher than before. I also tested four different masses: 0.125 kilograms, 0.250 kilograms, 0.375 kilograms, and 0.500 kilograms. The bean bag rose higher each time it was placed on a greater bulk.

On the speed test, the bean bag would frequently go higher than the bottle drop point, but not always. Furthermore, when it was dropped from the same height each time, the results differed significantly, for example, when it was dropped from 1.28, the results were 1.14, 1.30, and 1.30. Mass, on the other hand, was all in the same number range, with the exception that the numbers were somewhat different.

I used the calculations KE= 12 mv2 and Ht v2/2g. The initial step was to compute an object's kinetic energy, using the formula m=mass v=speed. The second was to determine the height at which I needed to drop something in order to reach a specific speed, where Ht=Height and g=Gravitational Acceleration of 9.8 m/s2.

I utilized these to create tables that depicted relationships between various variables, such as mass and KE or speed and height. My data kept increasing the entire time I was conducting the lab; when there was more mass/speed, the table had greater numbers.

This proves that my first theory was correct: as m/s increases, KE increases accordingly because they are all linear. When the bean bag height exceeded the water bottle drop mark, I was taken aback.

To summarize, my theory was supported by my data. When more mass or speed was introduced, the data values increased. This means that if I wanted more kinetic energy for something, I'd know to increase the mass or the speed of the object that was supplying the energy.

This hypothesis is valid because when you have greater mass, you also have more energy. So, if you drop a baseball, it isn't very heavy, so it will only propel the bean bag a short distance. However, because a bowling ball is quite heavy and has a lot of energy when it falls, it would force the bean bag to fly very high.

To improve this experiment, I would create the lever from a smoother material so that energy is not lost due to friction from the wood rubbing together. Perhaps a scanner or video camera to better document how far the bean bag traveled. All of these would aid the lab in obtaining more precise results, and they might perhaps be used in the future.

Step-by-step explanation:

Don't copy this word for word or you'll get in trouble.

Please help its line segment

Answers

Answer:

-9 3/4

Step-by-step explanation:

FG = GH

9x+15 = 5x+4

Subtract 5x from each side

9x+15-5x = 5x+4-5x

4x+15 = 4

Subtract 15 from each side

4x+15-15 = 4-15

4x = -11

Divide by 4

4x/4 = -11/4

x = -11/4

FG = 9x+15

FG = 9*(-11/4) +15

  = -99/4+15

    -99/4 + 60/4

   = -39/4

  = -9 3/4

true or false? in a two-column proof, the left column states your reasiong

Answers

False. The left column is for your statements , the right column is for your reasoning.

I need the perimeter of this triangle. Round to the nearest tenth. Quickly please

Answers

Answer:

The perimeter of the triangle is about 17.1 units.

Step-by-step explanation:

The perimeter of a triangle is the sum of its three side lengths.

We can see that the two legs of the triangle both measure five units.

To find the third segment, we can use the Pythagorean Theorem since the x-axis is perpendicular to the y-axis. Recall that:

[tex]a^2 + b^2 = c^2[/tex]

Where a and b are the two legs and c is the hypotenuse.

Our two legs are 5 and 5. Hence:

[tex](5)^2 + (5)^2 = c^2[/tex]

Solve for the hypotenuse:

[tex]\displaystyle \begin{aligned} c &= \sqrt{(5)^2 + (5)^2} \\ &= \sqrt{2(5)^2} \\ &= 5\sqrt{2}\end{aligned}[/tex]

Hence, our perimeter will be:

[tex]\displaystyle P = 10 + 5\sqrt{2} \approx 17.1 \text{ units}[/tex]

In conclusion, the perimeter of the triangle is about 17.1 units.

Point C is on line segment BD
. Given BD=5x,BC=4x, and CD=4, determine the numerical length of BD.

Answers

Answer:

BD measures 20 units.

Step-by-step explanation:

We are given that Point C is on the line segment BD, where:

[tex]BD = 5x, BC = 4x \text{ and } CD = 4[/tex]

And we want to determine the numerical length of BD.

Since C is somewhere on BD, BD is the sum of BC and CD:

[tex]\displaystyle BD = BC + CD[/tex]

Substitute:

[tex](5x) = (4x) + (4)[/tex]

Solve for x. Subtract:

[tex]x = 4[/tex]

Hence, the value of x is 4.

BD is given by 5x. Therefore:

[tex]BD = 5(4) = 20\text{ units}[/tex]

In conclusion, BD measures 20 units.

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