exam Maths Puzzle Numerical Ability

Tow cars leave town at the same time going in the same direction. One travels 55 mpb and the other travels 48mph. In how many hours will they be 49 miles apart?

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ABCD is a trapezoid with BC perpendicular to AB and BC perpendicular to CD, AB = 13, BC = 12, and CD = 8. A line segment is drawn from A to E, the midpoint of CD. a. Find the area of triangle AED. b. Find the perimeter of triangle AED. Please help me with these equations: X+2y=5, 3x-y=1, 3x+y+4, x+3y=-4 thank you so much..