Help please, Find the common difference for the sequence shown: 1/5, 13/40, 9/20

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

What is the standard form of -5x^2+2x^4-11+x^3+3x

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .