Which method should be used to solve the system? Explain your answer, including a description of the first step.-3x2 + 8y2 =19x + 9y =1
What will be an ideal response?
Substitution should be used, because using elimination would mean introducing an xy term into the second equation unnecessarily. The second equation should be solved for x or y.
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Complete the identity.
= ?
A. 2 tan 5x tan 3x B. tan 5x cot 3x C. tan 2x + tan 8x D. tan 5x
Solve the problem.The function f(x) = 4?x2 describes the volume, f(x), of a right circular cylinder of height 4 feet and radius x feet. If the radius is changing, find the instantaneous rate of change of the volume with respect to the radius when the radius is 7 feet. Leave answer in terms of ?.
A. 8? cubic feet per feet B. 56? cubic feet per feet C. 14? cubic feet per feet D. 28? cubic feet per feet
Solve the inequality. Express your answer using interval notation. Graph the solution set.6 ? 4x - 2 ? 26
A. [-7, -2]
B. [2, 7]
C. (2, 7)
D. (-7, -2)
Change the decimal to a percent.0.1383
A. 1.383% B. 0.01383% C. 138.3% D. 13.83%