Find f(3). f(x) = x2 + 5x - 9 the equation y = 2x + 1 is changed to y = 2x - 1. how does this change the graph of the line? a) the original line will shift down 1 unit. eliminate b) the original line will shift left 1 unit. c) the original line will shift left 2 units. d) the original line will shift down 2 units.

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?