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Andre45 [30]
3 years ago
15

If "u" varies directly with "v", and u = 6 when v = -7, what is "u" when v =4?

Mathematics
2 answers:
anastassius [24]3 years ago
8 0

Answer:

u = - \frac{24}{7}

Step-by-step explanation:

Given that u varies directly with v then the equation relating them is

u = kv ← k is the constant of variation

To find k use the condition u = 6 when v = - 7, then

6 = - 7k ( divide both sides by - 7 )

- \frac{6}{7} = k

u = - \frac{6}{7} v ← equation of variation

When v = 4 , then

u = - \frac{6}{7} × 4 = - \frac{24}{7}

77julia77 [94]3 years ago
7 0

Answer:

u = -24/7

Step-by-step explanation:

<u> u </u> = <u> 6 </u> = <u> u </u>

v      -7     4

-7u = 24

u = -24/7

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