Perform the indicated multiplication.-3(-4)(-6)
A. 28
B. 72
C. -72
D. -82
Answer: C
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Use an Euler diagram to determine whether the argument is valid or invalid.All horses whinny.
Therefore, all brown horses whinny.
A. valid B. invalid
If n is an integer, n ? 180° represents an integer multiple of 180°, and 
represents an odd integer multiple of 90°. Decide whether the expression is equal to 0, 1, -1, or is undefined. tan((2n + 1) ? 90°)
A. Undefined B. -1 C. 1 D. 0
Multiply.-10x(11x - 9)
A. -20x2 B. -110x2 + 90x C. 11x2 + 90x D. -110x2 - 9x
Each day Larry needs at least 10 units of vitamin A, 12 units of vitamin B, and 20 units of vitamin C. Pill #1 contains 4 units of A and 3 of B. Pill #2 contains 1 unit of A, 2 of B, and 4 of C. Pill #3 contains 
of A, 1 of B, and 5 of C.Pill #1 costs 8 cents, pill #2 costs 15 cents, and pill #3 costs 
Larry wants to minimize cost. What is the constraint inequality for vitamin B?
A. 3P1 + 2P2 + P3 ? 12 B. 3P1 + 2P2 + P3 ? 15 C. 4P1 + P2 + 10P3 ? 10 D. 8P2 + 15P3 + 2P3 ? 12