Preform the subtraction: (5x^2 -3xy +10y^2) - (12x^2 +11xz- 7z^2)

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Which point has an coordinates of (2,0) ? a

Asap will give brainiest to first person to answer what is the measure of angle b in the triangle? enter your answer in the box.m∠b=