Someone please help me with this

C

Step-by-step explanation:

let y = f(x) and rearrange making x the subject, that is

y = + 7 ( subtract 7 from both sides )

y - 7 = ( take the fourth root of both sides )

= x

Change y back into terms of x where x is g(x)

g(x) = , x ≥ 7

0.6

39mph

step-by-step explanation:

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.