1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Pie
3 years ago
12

*please help word problem* Adam and Barb had a used book sale over the weekend. Adam sold 4 hardcover books and ten paperbacks a

nd earned $64 for his efforts. Barb sold 5 hardcover books and 7 paperbacks for the same prices each. Barb made $58. Adam and Barb both charged the same price for the hardcover books and the same price for the paperbacks. How much did they charge for hardcovers and how much for paperbacks? Show your work.
Mathematics
1 answer:
vekshin13 years ago
3 0

Let us assume charge for a hardcover book = $ h

And charge for a paperback = $ p.

Adam sold 4 hardcover books and 10 paperbacks and earned $64.

So, we can setup an equation by using above statement.

4h + 10p = 64        -------------equation(1)

Barb sold 5 hardcover books and 7 paperbacks and made $58.

So, we can setup another equation by using above statement.

5h + 7p = 58         -------------equation(2)

Let us solve equation(1) and eqation (2) by elimination method.

Multiplying first equation by -5 and second equation by 4 and adding, we get

-20h -50p = -320

20h +28p =  232

___________________

    -22p = -88

Dividing both sides by -22, we get

-22p/-22 = -88/-22

p=4.

Plugging p=4 in first equation.

4h + 10(4) = 64

4h +40 =64

Subtracting 40 from both sides, we get

4h = 24.

Dividing both sides by 4, we get

4h/4 = 24/4

h=6.

Therefore, they charge $6 for a hardcover and $4 for a paperback.

You might be interested in
Y=x^2-2x-5;y=x^3-2x^2-5x-9
ehidna [41]
Are the directions asking you to solve these ?
8 0
3 years ago
Quadrilateral ABCD ​ is inscribed in a circle.
alexdok [17]
When a quadrilateral is inscribed in a circle, the opposite angles are supplementary.

x + 2 + 3x + 6 = 180
4x + 8 = 180
4x = 172
x = 43

Now solve for A
3(43) + 6 = A
129 + 6 = A
135 = A

The measure of angle A is 135 degrees.

Hope this helps =)
7 0
3 years ago
Find the surface area of the rectangular prism
OLEGan [10]
I believe it would be 72cm^2
8 0
2 years ago
Can anyone please help with this problem ASAP ?
lara31 [8.8K]

Answer:

4 would be $55.00 and 8 would be $75.00

8 0
2 years ago
Read 2 more answers
What number is 25% of 60?
nekit [7.7K]
25% of 60 is 15$ or just 15
6 0
3 years ago
Read 2 more answers
Other questions:
  • A circle whose circumference is 385 units has a diameter of _____ units.
    6·1 answer
  • On a coordinate plane, 2 rectangles are shown. The first rectangle has points A (negative 2, negative 1), B (4, negative 1), C (
    11·1 answer
  • What is the answer to 4x-5x+9=5x-9?
    11·2 answers
  • What is the value of R in this circuit
    8·1 answer
  • WILL GIVE BRAINLIEST
    5·1 answer
  • To convert a temperature in degrees celsius to degrees fahrenheit multiply the celsius temperature by 9/5 and then add 32° is th
    7·1 answer
  • For each of the following portions,draw a diagram of the mixture in the jar. Then shade a layer that would correspond this porti
    9·1 answer
  • 85% of 40 emails equals
    6·2 answers
  • Apollo Spas services 156 hot tubs. If each hot tub needs 105 mL of muriatic acid, how many liters of acid are needed for all of
    12·1 answer
  • Fill in the blank (no word bank)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!