Which set of lengths could not form a triangle? Don´t guess and explain with detailed reasoning. {5, 7, 10}

{2, 4, 5}

{8, 12, 5}

{15, 7, 6}

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

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?

Solve the system of equations. 2x-2y=-4 and x+y=8. show work