All categories

3 years ago

Derek has $20 to spend on used

2 answers:

5 0

5x+2y = 20

For every hardcover book (x) you will be charged 5$.

For every paperback book (y) you will be charged 2$.

The amount of both types of books you buy has to be under or equal to 20$

UkoKoshka [18]3 years ago

5 0

Answer:

The equation is 5x + 2y = 20

Step-by-step explanation:

Total money Derek having = 20 $

Cost of hardcover book = 5 $

Cost of paperbacks = 2 $

We need to find equation in standard form determines the number x of hardcover books and the number y of paperback books he can buy.

Total cost of x hard cover books = 5x

Total cost of y paperback books = 2y

He has only 20 $

So we have

5x + 2y = 20

The equation is 5x + 2y = 20

You might be interested in

Find the perimeter of the rectangle

Oksanka [162]

11+11+4+4=30 so the answer is thirty

8 0

2 years ago

Read 2 more answers

Find the volume of the triangular pyramid shown below

Greeley [361]

Answer:

Step-by-step explanation:

6 0

2 years ago

. The Empire State Building is a 102-story skyscraper. Its height is 1,250 ft. from the ground to the roof. The length and width

Aleks [24]

Answer: a) Dimensions of miniature is 0.17 × 0.08 × 0.5, b) 0.006 ft³.

Step-by-step explanation:

Since we have given that

Height of building = 1250 feet

Length of building = 424 ft

Width of building = 187 ft

Now, we know that The miniature version is just 1/ 2500 of the size of the original.

So, Height of miniature would be

$\dfrac{1250}{2500}=0.5\ ft$

Length of miniature would be

$\dfrac{424}{2500}=0.17\ ft$

Width of miniature would be

$\dfrac{187}{2500}=0.08\ ft$

a) What are the dimensions of the miniature Empire State Building?

Dimensions of miniature is 0.17 × 0.08 × 0.5

b. Determine the volume of the miniature building. Explain how you determined the volume.

$Volume=0.5\times 0.08\times 0.17=0.006\ ft^3$

Hence, a) Dimensions of miniature is 0.17 × 0.08 × 0.5, b) 0.006 ft³.

6 0

3 years ago

What is the value of x?

SSSSS [86.1K]

All angles in a triangle add up to 180

180 = 9 + 15 + 2x - 1 + 3x

180 = 24 - 1 + 2x + 3x

180 = 23 + 5x

180 - 23 = 5x

157 = 5x

Divide both sides by 5

X = 31.4 or 157/5

3 0

2 years ago

The ellipse 14x2+2x+y2=114x2+2x+y2=1 has its center at the point (b,c)(b,c) where

Nana76 [90]

18x^2 + 2x + y^2 = 1
==> 18(x^2 + x/9) + y^2 = 1 
==> 18(x^2 + x/9 + 1/324) + y^2 = 1 + 1/18 
==> 18(x + 1/18)^2 + y^2 = 19/18 
==> (x + 1/18)^2/19 + (y - 0)^2/(19/18) = 1. 

By comparing this to the standard form of an ellipse, the center is at (-1/18, 0).

6 0

2 years ago