Rewrite the expression in terms of exponentials and simplify the results. ln (cosh 6x - sinh 6x)
A. ln (e6x - e-6x)
B. -6
C. -6x
D. -12x
Answer: C
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Find the intersection.-2x + 7y = -8, 2y + 2z = 6
A. x = 14t - 58, y = 4t + 6, z = -4t
B. x = 14t + 
, y = 4t + 3, z = -4t
C. x = 14t - 
, y = 4t - 3, z = 4t
D. x = 14t + 
, y = 4t + 3, z = -4
Solve the problem.If the density of a substance is 1.17 × 10-6 tons per cubic foot, what would be the mass of 3.51 × 10-6 cubic feet of this substance. (Use the formula D = 
and round to the nearest hundredth, if necessary.)
A. 0.41 × 10-12 tons B. 4.11 × 10-13 tons C. 4.11 × 10-11 tons D. 4.11 × 10-12 tons
Use least common multiple or greatest common divisor to solve the problem.A brick layer is hired to build three walls of equal length. He has bricks which are 9 inches, 27 inches, and 15 inches long. He plans to build one wall out of each type of brick. What is the shortest length of wall possible?
A. 51 inches B. 135 inches C. 3645 inches D. 405 inches
Find all rational zeros of the polynomial.
?
What will be an ideal response?