The sum of three numbers is 50 . the second number is 2 times the third. the third number is 10 more than the first. what are the numbers?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Can someone, me with this. i really need with this