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2 years ago

37.5 is a 20% markup from which number? Explain how you found that number?

Mathematics

2 answers:

mestny [16]2 years ago

8 0

answer 31.25

if you don't trust me use a calculator

or 37.5 times 2o% is 31.25

Step-by-step explanation:

hope this helps

Sloan [31]2 years ago

5 0

Answer: 31.25

Step-by-step explanation:

Okie dokie, so if something is marked up by 20% it means, it is 120% the original number right?

So we can convert 120% into 1.2 to make solving this problem easier. :)

So if we want to find the original number, all we have to do is divide 37.5 by 1.2.

This gets us 31.25.

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3x-9 when x=3<br> Solve this

Citrus2011 [14]

Answer:

Step-by-step explanation:

3x - 9 if x = 3

Substitute:

3(3) - 9 =

9 - 9 = 0

This can be written as a function: f(x) = 3x - 9

f(3) = 3x - 9

f(3) = 3(3) - 9

f(3) = 9 - 9

f(3) = 0

-Chetan K

3 0

2 years ago

Convert Fraction to Percent<br> 5/8

jeka94

Answer:

62.5

All you do is divide 5 by 8 and you get this .625 move the decimal over two spots to the right and you get 62.5%

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2 years ago

Given: A= {(2,3), (5,1).(-3,-2), (0, 3))<br> What is the domain of A?

xxMikexx [17]

Answer:

The domain is (2,5,-3,0)

Step-by-step explanation:

we know that

For a set of ordered pairs, the first elements of each ordered pair represents the domain of the function and second elements of each ordered pair represents the range of the function.

The domain of a function is the set of all possible values of x

In this problem we have

$A= \ [(2,3), (5,1).(-3,-2), (0, 3)\ ]$

therefore

The domain is (2,5,-3,0)

4 0

2 years ago

The hardcover version of a book weighs twice as much as its paperback version. The hardcover book and the paperback together wei

HACTEHA [7]

Answer:

The 4th system (h = 4.2 − p ; h = 2p)

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

The volume of a hemisphere is 144 pi. Find the radius and total surface area.

sineoko [7]

Formula of the Volume of a hemisphere:
V = $\frac{2}{3}$ $\pi$ r³
144 $\pi$ = $\frac{2}{3}$ $\pi$ r³
Multiply by 3 to cancel fraction in the right side
144 $\pi$ × 3 = 2 $\pi$ r³
432 $\pi$ = 2 $\pi$ r³
Divide by 2 $\pi$ on either sides to isolate r³
$\frac{432 \pi }{2 \pi }$ = $\frac{2 \pi }{2 \pi }$ r³
2 $\pi$ and $2 \pi$ cancel out
216 = r³
Take cube root to find the radius
$\sqrt[3]{216}$ = $\sqrt[3]{r^3}$
6 = r
Radius is 6 units

The formula of the surface area of a hemisphere is:
S.A = 2 $\pi$ r² + $\pi$ r²
= $2\pi$ (6)² + $\pi$ (6)²
=2 $\pi$ × 36 + 36 $\pi$
= 72 $\pi$ + 36 $\pi$
= 108 $\pi$ units² (in terms of $\pi$ )
≈ 339.12 units²

Surface area = 108 $\pi$ units

8 0

2 years ago