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timurjin [86]
3 years ago
11

If x and y vary directly, and x = 12 when y = 4, what is the value of x when y = 1 ?

Mathematics
2 answers:
DerKrebs [107]3 years ago
6 0

Answer: x = 3

Step-by-step explanation:

y for x

4 for 12

1 for ?

Cross multiply

4? = 12 x 1

4? = 12

Divide both sides by 4

? = 3

When y = 1, x = 3.

Hope that helped!

castortr0y [4]3 years ago
4 0

Answer:

3

Step-by-step explanation:

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den301095 [7]

The geometric mean of the numbers is 5.38

Given the values a, b, c and d

Geometric mean of the values will be expressed as:

GM = (abcd)^1/4

Given the values 4, 5, 6 and 7, the geometric mean will be expressed as:

GM = (4×5×6×7)^1/4

GM = (840)^1/4

GM = 5.38

Hence the geometric mean of the numbers is 5.38.

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8 0
3 years ago
Twelve cupcakes cost $14.25. What is the price per cupcake? Round to the nearest cent.
DiKsa [7]

Answer:

$1.19

Step-by-step explanation:

14.25/12=1.19

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3 years ago
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Which comparison is true?
MA_775_DIABLO [31]
The second one because the denominator is smaller meaning the second term is smaller and the first is bigger 2/3 > 2/4
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Which function has an average rate of change of -4 over the interval [-2,2]?
kolbaska11 [484]

Only p(x) has an average rate of change of -4 over [-2, 2].

Find the average rate of change of each given function over the interval [-2, 2]]:

The average rate of change of m(x) over [-2, 2]:

<h3>What is the average rate?</h3>

The average rate of change = \frac{m(b)-m(a)}{b-a}

Where, a = -2, m(a) = -12

b = 2, m(b) = 4

Plug the values into the equation

The average rate of change

=\frac{4-(-12)}{2-(-2)} =\frac{16}{4}

The average rate of change = 4

The average rate of change of n(x) over [-2, 2]:

The average rate of change = \frac{n(b)-n(a)}{b-a}

Where, a = -2, n(a) = -6

b = 2, n(b) = 6

Plug the values into the equation

The average rate of change

=\frac{6-(-6)}{2-(-2)} \\=\frac{12}{4}

The average rate of change = 3

The average rate of change of q(x) over [-2, 2]:

The average rate of change = \frac{q(b)-q(a)}{b-a}

Where, a = -2, q(a) = -4

b = 2, q(b) = -12

Plug the values into the

The average rate of change = \frac{-4-12}{2-(-2)}

= \frac{-16}{4}

The average rate of change = -2

The average rate of change of p(x) over [-2, 2]:

The average rate of change = \frac{p(b)-p(a)}{b-a}

Where, a = -2, p(a) = 12

b = 2, p(b) = -4

Plug the values into the equation

The average rate of change = \frac{-4-12}{2-(-2)}

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The average rate of change = -4

The answer is D.

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8 0
2 years ago
4 x 9 1/2<br> four times 9 and a half
Strike441 [17]

Answer:

38

Step-by-step explanation:

4*9 1/2=38

Hand written explanation:

4*9=36

4*1/2=4/2=2

36+2=38

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