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Fiesta28 [93]
3 years ago
5

The expression 0.9(P−15)+0.05P represents the final price of a chair after two discounts were taken and a delivery fee. The deli

very fee is added to the discounted price after the first two discounts. The variable P represents the price of the chair before discounts and fees are applied. Which statements are true? Select each correct answer. The delivery fee was 5% of the original price. The price of the chair was first reduced by $15. The delivery fee was 15% of the original price. The price of the chair was first reduced by 10%.
Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
4 0
Your answer is 0.95p-13.5
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Suppose f is a function. If 10 = f(-4), find the coordinates of a point on the graph of f?
Rashid [163]

Given:

For a function f, 10 = f(-4).

To find:

The coordinates of a point on the graph of f.

Solution:

We have,

10 = f(-4)

It means the value of function f is 10 at -4.

On a coordinate plane x-axis represents the input values and y-axis represents the output values of a function. So,

x-coordinate = input value = -4

y-coordinate = output value = 10

Therefore, the required coordinates of a point on the graph of f are (-4,10).

5 0
4 years ago
José collects stamps. He has 7 used stamps for every 4 new stamps. If he has 28 new stamps, how many used stamps does he have?
jenyasd209 [6]

Answer:

José has 49 used stamps

Step-by-step explanation:

7 used stamps for every 4 new stamps

To solve this type of problem, we can use a ratio

7 : 4 ratio

He has 28 new stamps

7 : 4 = x : 28

Ratios can be written as fractions

\frac{7}{4} = \frac{x}{28}

Cross multiply

4x = 7(28) = 196

Divide by 4 on both sides

x = 49

Hope this helps :)

3 0
3 years ago
If a snowball melts so that its surface area decreases at a rate of 9 cm2/min, find the rate (in cm/min) at which the diameter d
zhuklara [117]

Answer:

The diameter decreases at a rate of 0.143cm/min when it is of 10 cm.

Step-by-step explanation:

Surface area of an snowball:

An snowball has spherical format. The surface area of an sphere is given by:

S = d^2\pi

In which d is the diameter of the sphere.

In this question:

We need to differentiate S implicitly in function of time. So

\frac{dS}{dt} = 2d\pi\frac{dd}{dt}

Surface area decreases at a rate of 9 cm2/min

This means that \frac{dS}{dt} = -9

At which the diameter decreases when the diameter is 10 cm?

This is \frac{dd}{dt} when d = 10. So

\frac{dS}{dt} = 2d\pi\frac{dd}{dt}

-9 = 2(10)\pi\frac{dd}{dt}

\frac{dd}{dt} = -\frac{9}{20\pi}

\frac{dd}{dt} = -0.143

Area in cm², so diameter in cm.

The diameter decreases at a rate of 0.143cm/min when it is of 10 cm.

8 0
3 years ago
Will 7/8x6/6 be less than or greater than 7/8?
Akimi4 [234]
The answer to 7/8 * 6/6 is equal to 7/8 because 6/6 is equal to 1 and any number multiply by 1 is the own number :)))
i hope this is helpful
have a nice day 
8 0
3 years ago
An object is at rest on a table. The gravitational force is 10 N down, and the normal force is 10 N up. What is the net force?
Anastasy [175]

--->  0 <---

suppose this "0" is an arbitary object. The net force will be against it from both sides (left and right)

5 0
3 years ago
Read 2 more answers
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