Elenas age is equal to the product of her sisters age, which is represented by y, and 4. Write an expression that represents this scenario Then solve for Alina’s age if Y equals three.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

3x = 729 solve for x plz . it's urgent. will mark

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?