Solve the system of equations. {8x+16y=−42−2x+3y=7 A. (–4, 1) B. (0.5, –2.69) C. (4.3, 0.5) D. (–4.25, –0.5)

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b