Solve the system of equations.

3x+3y+6z=3
3x+2y+6z=7
4x+4y+7z=4

A. (x=5, y=-4, z=0)
B. (x=4, y=-3, z=1)
C. (x=6, y=-5, z=-1)
D. (x=7, y=-6, z=2)

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

What expression is equivalent to (2x-1)(x-3)?

Your weight on the moon is relative to your weight on earth. neil armstrong weighed 360 lbs. in his moon gear while on the earth, but on the moon he only weighed 60 lbs. how much would a 150 lb person weigh on the moon?