Mathematics, 18.03.2020 03:58 angel8953
An old lady has 125 cats. Seven of them are old, 9 of them are her favorite, 5 of them are both old and favorite. How many of them are neither old nor favorite.
Answers: 3
Mathematics, 21.06.2019 12:50
What is the value of y in the solution to the system of equations? x + y = 12x – 3y = –30a. –8b. –3c. 3d. 8
Answers: 1
Mathematics, 21.06.2019 17:30
Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?
Answers: 1
Mathematics, 22.06.2019 00:00
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?
Answers: 3
An old lady has 125 cats. Seven of them are old, 9 of them are her favorite, 5 of them are both old...
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