Solve, using the substitution method.
y + 2x = 7
14 – 4x = 2y

a. the solution is (1, 5)

b. the solution is (21, 0)

c. there are an infinite number of solutions.

d. there is no solution.

Brady has a 20 year fixed rate mortgage for $215,500 with monthly payments of 1,305.89.the annual interest rate is 4%. what is the total cost of the principal and interest for this loan rounded to the nearest dollar

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.

If a line is defined by the equation y = 5x + 2, what is the slope?