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algol [13]
3 years ago
11

levi is buying used books.He buys 5hardcover books and 2 paperback books. He spend $28. if the books are all the same price,how

much does each book cost ​
Mathematics
1 answer:
Nataly [62]3 years ago
3 0

Answer:

Each book cost 4 dollars

Step-by-step explanation:

There are 5 hardcover and 2 paperback books

We know that the information doesn't matter as they cost the same singularly

He bought 7 books and his total spent is 28

28 divided by 7 is 4

bringing us the total of 4 dollars per book

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for all values of x , a function f is defined by f(x)=x^2+7x+12 if f(a)=2, what could be the value of a?​
Evgesh-ka [11]

Answer:

a = -2 or a = -5

Step-by-step explanation:

We want f(a) = a^2 + 7a + 12 = 2. We can subtract 2 from both sides of this equation to get a^2+7a+10=0. We can factor this to get that (a+2)(a+5)=0. When the product of two numbers is equal to zero, one of the numbers must be equal to zero. This means that either a + 2 = 0, in which case a = -2, or a + 5 = 0, in which case a = -5.

4 0
2 years ago
Three times the sum of a number and seven is two less than five times the number. . a. 3x+7=5x-2. b. 3(x+7)=5x-2. c. 3(x+7)=2-5x
Nuetrik [128]
<span>We dissect each statement from the problem above to fully understand it.

the sum of a number and 7 is (x + 7)

3 times this is 3(x + 7)

is means the equal sign here </span><span>3(x + 7) = </span><span>

Two less then 5 times the number is 5x - 2.

Therefore, the answer is B, 3(x + 7) = 5x - 2</span>
5 0
2 years ago
What is 4/11 divided by 4/9? Perform the indicated operation.
GalinKa [24]

Answer:

The answer is 11/9

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Two sides of a rectangle are the same length, r. The other two sides are each 4 meters.
exis [7]

Answer:

4 times 4 plus 10

Step-by-step explanation:

there are waaaay more ways than just this there is

( 8 times 2 ) plus ( 5 times 2 )

and

( 5 plus 5 ) plus 16

plz mark me as brainiest

5 0
3 years ago
If eight is added to four times a number the result is 96
Ilia_Sergeevich [38]

Answer:

12

Step-by-step explanation:

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