Solve the problem.The perimeter of a rectangle is 42 cm. The length is 9 cm more than the width. Find the length and the width.
A. Length: 21 cm; width: 12 cm
B. Length: 15 cm; width: 6 cm
C. Length: 17 cm; width: 8 cm
D. Length: 9 cm; width: 6 cm
Answer: B
Mathematics
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Identify a, b, c, with a > 0, for the quadratic equation.x2 + 1 = -9x
A. a = 1, b = -9, c = 1 B. a = 1, b = 9, c = 1 C. a = 1, b = 1, c = -9 D. Not quadratic
Mathematics
Find the probability. Round to the nearest ten-thousandth when necessary.A bag contains 6 cherry, 3 orange, and 2 lemon candies. You reach in and take 3 pieces of candy at random. Find the probability that you have all cherry candies.
A. 0.7272 B. 0.1091 C. 0.1212 D. 0.3636
Mathematics
Complete.15 hr = ___ sec
A. 54,000 B. 90,000 C. 5400 D. 900
Mathematics
Multiply.-9x(-12x + 3)
A. 108x2 - 27x B. 108x2 + 3x C. 81x2 D. -12x2 - 27x
Mathematics