Okay, well, my little brother has a question for his 7th-grade math homework that i can't even figure out. mom and dad have literally no idea either.
here it is:
95 + x/75 = 95
, hope you can !

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?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?