Raj wrote the four equations that are shown below. A 3 (x + 4) = 3 (x + 2) + 6 B 6 (x minus 1) = 3 (x minus 1) + 3 C 5 x + 4 minus x = 2 (2 x minus 2) D Negative 2 (x + 3) + x = negative x minus 6 He examined them, without solving them, to determine which has no solution. Which of Raj's equations has no solution? 3 (x + 4) = 3 (x + 2) + 6 6 (x minus 1) = 3 (x minus 1) + 3 5 x + 4 minus x = 2 (2 x minus 2) Negative 2 (x + 3) + x = negative x minus 6

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?