7^7/7^3=7^x solve for x

What is (28 + 7 + 6 + 3) x 1/2 show your work

Given a circle with measures of (c, d, and r) and a circle with measures of (c', d', and r'), what is d if c c' = 12 and d' = 0.50? a) 3 b) 6 c) 12 d) 24

Solve the system of equations y= 3/2 - 1, -x+ y =-3