Simplify the expression by combining like terms. 3(6+x) =24 Theres 3 category's for these fallowing equations 1st category: Yes 2nd: No 3rd: Not enough information. Heres the equations you put in one of those category's 1. 18+x=24 2. 3(6+x)=72 3. 18+3x =24 4. 6+x=8 5. (3x6)+(3xh)=24 6. 6+3x=24

Lots of points if you help me!!

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?