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2 years ago

Y and x have a proportional relationship, and y = 25 when x = 60. What is the value of x when y = 30?

1 answer:

3 0

The equation governiong this relationship is y = kx. Since y = 25 when x = 60,
25 = 60k, and k=(5/12). Thus, the equation is y = (5/12)x.

If y = 30, then 30 = (5/12)x. Mult. both sides by 12/5 to obtain the value of x:

(12/5)(30) = 360/5 = 72

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2 years ago

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2 years ago

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Answer:

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Step-by-step explanation:

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Combine like terms using P.E.M.D.A.S:

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2 years ago

a tune up automotive facility marks up its parts by 45%. suppose that the facility charges its customers 2.32 for each spark plu

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Answer:

$1.6

Step-by-step explanation:

The price of $2.32 already includes the 45% mark up hence taking the original cost to be x, it means the cost of $2.32 is 145% of the original cost

Using the concept of cross multiplication we say that if

1.45 is equivalent to $2.32

1 is equivalent to x

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Therefore, the company incurs $1.6 for each plug

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2 years ago