Find the quarter point of y=1/2sin(2x+π)

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.