Question

etrer

Answer 1

x - 2y = 4 first substract x form both sides
-2y=-x+4 then divide by -2
y=1/2x-2
so the answer would be C

Answer 2

thaanksss

Answer 3

for the 2nd one
direct variation is y=kx but in this case since its the square of x
y=kx^2 substitute the variables in order to find k
100=k5^2
100=25k
k=4 now substitute k into the equation
y=4x^2 now we can find y with x
y=4(6^2)
y=4(36)
y=144 so again the answer is C

Answer 4

for the 3rd one
inverse variation is y=k/x or k=xysince its two x its
y=k/2x or k=2xy we will use the 2nd one since its easier, substitute x and y
k=2(2)*5
k=4*5
k=20
so the equation is y=20/2x so substitute x
y=20/(2*10)
y=20/20
y=1 so the answer is A