All categories

3 years ago

A book is on sale for 30% off. The sale price of the book is $14. What is the original price of the book

Mathematics

1 answer:

Yuki888 [10]3 years ago

8 0

Since $14 is the price after a 30% discount then $14 is 70% of the original price.

$14/70=x/100 (100% would be the original price)

1400=70x or 1400/70 = $20!

You can double check the work by taking 30% off the $20 (10% would be $2, 30% would then be $6) 20-6=14!

You might be interested in

Find the solution of this system of equations.

Elenna [48]

-4x + y = -25 y = 4x - 25

-6x - 6y = 0 

-6x - 6(4x - 25) = 0
-6x - 24x + 150 = 0
-30x + 150 = 0
-30x = -150
x = 5

y = 4(5) - 25
y = 20 - 25
y = -5

(5, -5)

8 0

3 years ago

Ethan created three triangles: triangle X, triangle Y, and triangle Z. If Triangle Y is congruent to triangle X and Triangle Y i

GaryK [48]

Step-by-step explanation:

if X is congurent to Y

and Y is congruent to triangle Z

then all the triangles will be congruent to each other

hope u get it

8 0

3 years ago

What is the answer? ???????

galina1969 [7]

Cross multiply:

30n = 2400. Then n = 80.

8 0

3 years ago

Any help with this question kinda brained

kodGreya [7K]

I believe the answer is is two

4 0

2 years ago

Refer to this sketch of a warehouse please answer please and thank you

stiv31 [10]

Answer:

2) 12,000 ft²

3) 30 gallons.

Step-by-step explanation:

2) 1. You can calculate the lateral surface area of the exterior walls of the warehouse by applying the formula shown below:

$LA=h(2l+2w)$

Where h is the height, l is the lenght and w is the width.

2. Substitute values and you obtain that the lateral area is:

$LA=20ft[(2*200ft)+(2*100ft)]$

$LA=12,000ft^{2}$

3) You know that 1 gallon of paint covers 400 ft², therefore for 12,000 ft² are needed the following number of gallons (which is represented by x):

$x=\frac{(1gallon)(12,000ft^{2})}{400ft^{2}}=30gallons$

8 0

3 years ago