qttaliyah qttaliyah
  • 17-01-2021
  • Mathematics
contestada

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

If u varies directly with v and u 6 when v 7 what is u when v 4 class=

Respuesta :

clarch19
clarch19 clarch19
  • 17-01-2021

Answer:

u = -24/7

Step-by-step explanation:

u = 6 = u

v      -7     4

-7u = 24

u = -24/7

Answer Link
jimrgrant1 jimrgrant1
  • 17-01-2021

Answer:

u = - [tex]\frac{24}{7}[/tex]

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 )

- [tex]\frac{6}{7}[/tex] = k

u = - [tex]\frac{6}{7}[/tex] v ← equation of variation

When v = 4 , then

u = - [tex]\frac{6}{7}[/tex] × 4 = - [tex]\frac{24}{7}[/tex]

Answer Link

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