x + 5, Angie is five years older than Bob., x - 5, Bob is five years younger than Angie., x ÷ 2, Ahmed is half as old as Jamil., 2x, Jamil is twice as old as Ahmed., 4x, Perimeter of a square with sides x, x2, Area of a square with sides x, 3x, Perimeter of a triangle with sides x, 2x ÷ 2, Area of a triangle with base x and height 2x, xπ, Circumference of a circle with diameter x, πx2, Area of a circle with radius x, πx2 ÷ 2, Area of a semi-circle with radius x, xπ ÷ 2 + x, Circumference of a semi-circle with diameter x, 2x2 + 12x, 4𝑥 + 9𝑥2 + 8𝑥 − 7𝑥2, 2x2 + 12, 2(x2 + 6)

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