Explanation: Average = (3+7+11+15+19)/5 = 55/5 = 11.
Explanation: 0.6 × 0.5 = 0.30 = 0.3.
Explanation: 12 + 4y = 24, 4y = 12, y = 3.
Explanation: 25% of 120 = 0.25 × 120 = 30.
A 180°
B 270°
C 360°
D 540°
Explanation: The sum of interior angles of a quadrilateral is 360°.
Explanation: 3⁴ / 3² = 3² = 9.
Explanation: 2/3 - 1/6 = 4/6 - 1/6 = 3/6 = 1/2.
Explanation: 2(9) - 5(3) + 1 = 18 - 15 + 1 = 4.
Explanation: 35% of 400 = 0.35 × 400 = 140.
Explanation: By definition, 0! = 1.
A x = 1 or x = 6
B x = 2 or x = 3
C x = -2 or x = -3
D x = 2 or x = -3
Explanation: (x-2)(x-3) = 0, so x = 2 or x = 3.
A 54√3
B 108
C 36√3
D 72√3
Explanation: Area = (3√3/2)(6²) = (3√3/2)(36) = 54√3.