Whats 2+2 bet you dont know

Football player weighed 170 2/3 pounds in may. during the summer he gained 25 5/12 pounds. during the first week of fall practice he lost 10 1/4 pounds and during the second week he lost another 3 1/2 ponds. how much does he weigh at this point? a.182 1/3ib b.181 1/2ib c.182 5/12ib d.183 2/3ib

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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