If t varies as v, and t = 2 4/7 when v =13/14 , find v when t = 2 1/4 a) 2106/392 b) 13/16 c) 324/52

Answer : b) 13/16

Given : t varies as v

So t = k v  where k is the constant of proportionality.

t = 2 4/7 when v =13/14. Using these values we find out k

t = k * v

Multiply by 14/13 on both sides

So  

We got the value of k. Now we find v when t = 2 1/4

t = k * v

We know the value of t and k

Multiply by 13/36 on both sides

So  

Option B is correct

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: