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NNADVOKAT [17]
2 years ago
14

Dan had 78 dollars to spend on 7 books. After buying them he had 15 dollars. How much did each book cost?

Mathematics
2 answers:
andrezito [222]2 years ago
8 0
78-7x=15
-7x=-63
X=9
Each book costs $9
gladu [14]2 years ago
7 0
I think each book cost $9
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Veseljchak [2.6K]

Car A                               Car B

d=rt                                  d = rt

d = ra * 2.4                        d = rb 4

ra = rb+22

distances are the same so set the equations equal

ra * 2.4 =rb *4

substitue in  for ra

(rb+22) 2.4 =rb *4

distribute

2.4 rb +52.8 = 4 rb

subtract 2.4 rb from each side

52.8 = 1.6 rb

33 = rb

Car b travels at 33 miles per hour

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3 years ago
Derek makes $8ban hour. Last week his paycheck was $280, before taxes. How many hours did he work last week?
Ber [7]

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35 hours that week

Step-by-step explanation:

280÷8=35

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3 0
3 years ago
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jessica will babysit children for $8 an hour. ciara will babysit for an appointment fee of $12 and $4 an hour. how many hours wo
SSSSS [86.1K]

Answer:

Answer are in bold below

Step-by-step explanation:

Question: 1

Jessica = $8

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Question 2:

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3 years ago
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miv72 [106K]

Answer:

28 = x

Step-by-step explanation:

62 =  angle BAC  since they are vertical angles

angle ABC is a right angle since KL is perpendicular to FG

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62 + 90 + BCA = 180

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3 years ago
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melomori [17]

Answer:

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Step-by-step explanation:

Adding x^2 and x leaves no like terms, so no simplification is required.

Multiplying gives x^2*x, which is x*x*x, which is then x^3

3 0
3 years ago
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