Please help! 6x+7y=4x+4y

Complete the missing value in the solution to the equation.

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The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?

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?

If there are 825 students at cherry hill high school and 4 out of every 5 students voted in the student council election, how many students voted?