None are correct because not all angles of the triangle are acute because one side of it is a right angle and not one of the angles or obtuse. <span />
One train will be travelling at 60 mph, and the other train will be travelling at 70 mph. 70 * 5.5 = 385, 60 * 5.5 = 330. 330 + 385 = 715
Isolate the variable by dividing each side by factors that don't contain the variable.
Exact Form:
x=29/9
Decimal Form:
x=3.2
Mixed Number Form:
x=3 2/9
