I need help asap thanks

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)