The answer is probably c if I’m correct
3(a-b) and 3a-3b. Equivalent
2a(2+b) and 4ab. Not equivalent
He slings the stone at him
It would be = because they shipped the same amount in each year
let the speed of plane in still air be x and that wind be y
therefore:
x+y=490
x-y=390
next we solve for the values of x and y, first we add the above equations. This will give us:
2x=880
x=880/2
x=440 miles per hour.
substituting the value of x in one of the equations and solving for y we get:
440+y=490
y=490-440
y=50 miles per hour
