3. Write and solve a linear system of equations to answer this question. a. An appliance store sells a washer-dryer combination for $1400. If the washer costs
$250 more than the dryer, find the cost of each appliance.
What is the cost of the washer? What is the cost of the dryer?

H(x)=4x2-5x h(-3) what is the answer?

Which expression is equivalent to -5(3x - 6/7)

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?