Reflection across y=x

J(1,3), U(0,5), R(1,5) C(3,2)

If f(x) = 4x – 3 and g(x) = 8x + 2, find each function value a. f[g(3)] b. g[f(5)] c. g{f[g(-4)]}

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.