Puedo patearla tan fuerte como pueda.
ah, those are systems you want one variable to cancel out. I would time the bottom equation by -1 so x cancels then u solve for y. then u plug all back in to solve for x.
Answer:
put formula a square minus b square
V= 1/3BH
= 1/3( 1/2x9x5)10
= 1/3(45/2) 10
= 75in ^3
30. is just asking where the two equations graphed intersect each other...
x = -3 and x = 1 for intersections.
