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aev [14]
3 years ago
7

If y varies inversely as x, and x= 8 when y = 4, find y when x = 2

Mathematics
2 answers:
VMariaS [17]3 years ago
8 0

Answer:

y = 16

Step-by-step explanation:

Use the inverse variation equation, y = \frac{k}{x}

Plug in 8 as x and 4 as y, then solve for k

y = \frac{k}{x}

4 = \frac{k}{8}

32 = k

So, k is 32.

The equation is y = \frac{32}{x}

Plug in 2 as x and solve for y

y = \frac{32}{x}

y = \frac{32}{2}

y = 16

So, when x = 2, y = 16

VladimirAG [237]3 years ago
4 0

Answer:

I'm pretty sure that it is 8 but I'm not entirely sure

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What is the solution to the system of equations graphed below?
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Short Answer B
Remark

You need not do any calculations to get the answer. You are required just to read the graph. Doing the calculations would be beneficial but unnecessary.

Step One
Find the x value.
1. If you have a ruler or a straight edge of some kind, put it on the cross point of the two graphs.
2. Make the ruler go straight up and down. You will find out it goes 1 point back of the 5.
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