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GuDViN [60]
3 years ago
9

If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8?

Mathematics
2 answers:
IRINA_888 [86]3 years ago
6 0

Answer:

For the case when x = 8, we have that y = 2/3.

Step-by-step explanation:

The idea that y varies directly as x, can be written in an equation as:

y = k*x, where k is an unknown constant (until now).

We know that y=6 when x=72, then, substituting these values in the above formula gives us the value of k:

6 = k*72, then: k = 6/72 = 1/12.

Now, we can rewrite our initial expression with the known value of k as:

y = (1/12)*x

For the case when x = 8, we have that:

y = (1/12)*8 = 8/12 = 2/3.

Len [333]3 years ago
4 0
Assumption: y=kx then sustitude y=6,x=72 into y=kx
then 12y=x
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WILL GIVE BRAINLIEST
tiny-mole [99]

The expressions for each of the given statements are

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<h3>Writing an expression </h3>

From the question, we are to write an expression for each of the given statement

a. the sum of 6 and z

That is,

6 + z

b. the difference between 20 and x

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20 - x

c. 8 less than the quotient of x divided by 6

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x/6 - 8

d. x increased by 5 divided by 4

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x + 5/4

Hence, the expressions for each of the given statements are

a. 6 + z

b. 20 - x

c. x/6 - 8

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1 year ago
Thời gian để sản xuất một sản phẩm loại A là một BNN tuân theo luật phân phối chuẩn với các tham số m = 15 và s= 2 (đơn vị là ph
ser-zykov [4K]

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−u²n²t²s²arme²

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