the sum of the speeds of two trains is 716.7 miles per hour if the speed of the first train is 5.3 miles per hour faster than a second train find the speed of each

Of the ones listed here, the factor that had the greatest impact on the eventual destruction of native americans' ways of life was the development of the a) automobile. b) highway. c) railroad. d) steamboat.

Don't know how to find x given these segment lengths

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation