Evaluate the function for the given value of x f(x)= absolute value of x+4 when x= -8

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?