7x - 2 = 2y 3x = 2y - 1 solve the system of equations by substitution. (3/4, 13/8), (1/4, -1/8), no solution, coincident

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

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

I’ve been trying all day to figure this puzzle out. i need the work for it aswell. it is a factoring polynomials tarsia. the image is below.