PLEASE HELP IM GIVING 5 STAR RATINGS Given the equation 7x+3=7x , what would go in the blank to make each of the following true:

So the equation is true for no values of x

So the equation is true for all values of x.

So the equation is true for only one value of x.

Which graph represents an even function?

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y

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?