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Genrish500 [490]
3 years ago
6

A jet ski rental company charges h dollars for the first hour its jet skis are rented and k

Mathematics
1 answer:
skad [1K]3 years ago
8 0

Answer:

C. h + k (t - 1)

Step-by-step explanation:

<em>If we use an example, you can plug in the numbers and test out which equation works. Say the first hours costs $10 and each hour after that is an additional $5. If someone rents a jet ski for 4 hours, how much did it cost?</em>

The first hour = $10

The 3 additional hours (totaled) = $15

Cost = $25

<em />

<em>So now that we know the cost, we can plug in our numbers to these equations to find which one comes out with $25.</em>

h = 10

k = 5

t = 4

<u>A</u>. 10 + 4 + 5 = <u>19</u>

<u>B</u>. 10 + (4 · 5) = 10 + 20 = <u>30</u>

<u>C</u>. 10 + 5 (4 - 1) = 10 + 5 (3) = 10 + 15 = <u>25</u>

<u>D</u>. 10 + 5 (4 + 1) = 10 + 5 (5) = 10 + 25 = <u>35</u>

<u>E</u>. 10 + (4/5 - 1) = 10 + (-0.2) = <u>9.8</u>

<em>C is the only problem that comes out as $25, therefore it must be the correct answer.</em>

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Step-by-step explanation:

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*WILL MARK BRAINLIEST*
tankabanditka [31]

Answer: Charges for  a hardcover book is  $6 and Charges for  a paperback book is  $4

Step-by-step explanation:

1) This problems belongs to linear equation in two variables. From this problem , we can say that we required  a pair of linear equation to solve linear equation in two variables.

2) lets create equation

let the charges for  a hardcover book is represented by variable x

let the charges for  a paperback book is represented by variable y

Creating equation related to Adams work

Adam sold 4 hardcover books and 10 paperback books .

So  Adams earning = (4 × x ) + ( 10 × y)

⇒ 4x + 10y = 64         ------equation 1                 [ given earning of Adam = 64 ]

Creating equation related to Barb work

Barb sold 5 hardcover books and 7 paperbacks for the same prices each

so Barb's earning = (5 × x ) + ( 7 × y)

⇒ 5x + 7y = 58         -------equation 2               [ given earning of Barb = 58 ]

so two equations are

4x + 10y = 64         ------equation 1       And

5x + 7y = 58         ------equation2

where variable x represents charges for  a hardcover book and variable y represents charges for paperback books


3)  lets solve two equation derived in step 2

4x + 10y = 64         ------equation 1       And

5x + 7y = 58         ------equation2

On multiplying equation 1 by 5 and equation 2 by 4 to make coefficient of variable x same.

5 × ( 4x + 10y = 64 )

= 20 x + 50 y = 320     ---------------equation 3

4 × ( 5x + 7y = 58 )

= 20x + 28y = 232       ----------------equation 4

subtracting  equation 3 from equation 4 we get

20x - 20x +50y - 28y = 320 - 232

⇒ 22y = 88

⇒ y = 88/22 = 4

On substituting value of y in equation 1 , we get

4x + 10× 4 = 64

⇒ 4x = 64 - 40 = 24

⇒ x = 24/4 = 6

Hence charges for  a hardcover book = x = $6

And charges for  a paperback book = y = $4








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Answer:

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Answer:

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