Answered

1.if y varies inversely as x and y=-4 when x=-2,find x when y=2.
a.8 b.4 c.-4 d.-8

2.if y varies directly as x and y=15 when x=5,find y when x=10.Find the constant of variation.
a.3 b.15 c.15_5 d.30

Sagot :

Imfeyfey7viz

Answer:

1. B.

2. D.

Step-by-step explanation:

[tex]y \infty \frac{k}{x} \\ xy = k[/tex]

1.

[tex]( - 2)( - 4) = x(2) \\ x = 4[/tex]

[tex]y \infty kx \\ \frac{y}{x} = k[/tex]

2.

[tex] \frac{15}{5} = \frac{y}{10} \\ y = 30[/tex]

Viz Other Questions