Please answer questions

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?

What is the solution of log2  (3x  -  7)  =  3? 4 5

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