Factor completely.10x4 + 21x2 + 9
A. (2x2 + 1)(5x2 + 9)
B. (10x2 + 3)(x2 + 3)
C. (5x2 - 3)(2x2 - 3)
D. (2x2 + 3)(5x2 + 3)
Answer: D
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Use the given graph of f(x) = ax2 + bx + c to solve the specified inequality.f(x) > 0
A. no solution B. x < -4 or x > 3 C. x < -4 D. -4 < x < 3
Solve the percent problem.Brand X copier advertises that its copiers run 14% longer between service calls than its competitor. If Brand X copiers run 35,400 copies between service calls, how many copies would the competitor run (to the nearest copy)?
A. 30,444 copies B. 31,053 copies C. 19,032 copies D. 40,356 copies
Find the requested area.Find the area of the shaded region.
A. 229
in2
B. 228
in2
C. 229
in2
D. 228
in2
If y varies directly as x, find the direct variation equation for the situation.y = 1.4 when x = 0.7
A. y = 0.7x B. y = 0.5x C. y = x + 0.7 D. y = 2x