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
Viktor [21]
3 years ago
14

the local bookstore is having a sole on used books . nate bought 3 hardcover books and 7 paperback books and spent 29.50. tia bo

ught 2 hardcover books and 5 paperback books and spent 20.50. what is the cost of a hardcover book
Mathematics
1 answer:
Mkey [24]3 years ago
6 0
The first thing we must do for this case is to define variables.
 We have then:
 x = cost of a hardcover book
 y = cost of a paperback book
 We write the system of equations:
 3x + 7y = 29.50
 2x + 5y = 20.50
 The solution to the system is:
 x = 4 $
 y = 2.5 $
 Answer:
 the cost of a hardcover book is $ 4
You might be interested in
Use the picture below to find the length of x. Round your answer to the nearest hundredth.
valentinak56 [21]

Answer: 6.71

=======================================

Work Shown:

The longest horizontal portion of length 6 breaks up into two equal pieces of length 3 each. Focus on the smaller right triangle on the right hand side. This right triangle has legs of 3 and 6. The hypotenuse is x.

Use the pythagorean theorem with a = 3, b = 6, c = x to find the value of x

a^2 + b^2 = c^2

3^2 + 6^2 = x^2

9 + 36 = x^2

45 = x^2

x^2 = 45

x = sqrt(45)

x = 6.7082039

x = 6.71

4 0
3 years ago
Classify the decimal forms of 3/12 and and 2/9 as repeating or as repeating or terminating.​
andre [41]

Answer:

3/12: terminating; 2/9: repeating

Step-by-step explanation:

3/12=0.25 terminating as it has a finite number of digits after the decimal point.

2/9=0.222.... repeating decimal as its number is repeated indefinitely.

6 0
3 years ago
Describe how to subtract two numbers written in scientific notation with the same power of 10
OverLord2011 [107]

Answer:

All you need to do is subtract the coefficient.

Step-by-step explanation:

For example a minus b is c. So this is simply going to be c times d to the e you can do that if these two are the same.

8 0
2 years ago
What value of x is in the solution set of 8x – 6 > 12 + 2x?
Crazy boy [7]

Answer:

ur answer is there !!!

hope it will help you

8 0
3 years ago
Read 2 more answers
Find the area of the triangle if the length is 22 and the height is 15
Ymorist [56]

Answer:

low 0.5 *the length of the base * the height

Step-by-step explanation:

0.5*22*15=165

5 0
2 years ago
Read 2 more answers
Other questions:
  • Choose the option that correctly completes the statement.
    12·1 answer
  • What is the area of the rhombus
    15·1 answer
  • What is 1/2 of 22 and 2/3 of 16
    9·1 answer
  • What is the product of (4x-7)(4x+7)?
    9·1 answer
  • Simplify 60 over 1 and 1/4
    7·2 answers
  • Help can some one do number 10 please
    7·1 answer
  • 5 times what equals 200
    15·1 answer
  • Classify each triangle by its sides.
    14·1 answer
  • Find the value of x
    13·1 answer
  • Write the improper fraction 30/7 as a mixed number
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!