Students have been saving up for a trip to the mall. Jherica has $5.50 more than Erin, and Alexa has $10.00 less than Jherica. Together they have a total of $85.00. How much does each person have?

Which number line represents the solution set for the inequality -1/2x> 24?

If you answer 2+2 you will get over 80 points

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?