Write an equation to match each statement. then solve. #1) 8 less than a number x is -12. #2) 15 more than a number k is 2. #3) a number divided by -7 is -20. #4) the product of 5/8 and a number is -20.

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent

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?