Randy's football team had the ball on the zero yard line. on their first play they gained 6 yards. on the second play they lost 4 yards. on what yard line is the ball now?

Which two undefined geometric terms always describe figures with no beginning or end?

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?