Factor by grouping.3x2 + 5x + 15x + 25
A. (3x + 5)(3x + 5)
B. (x - 5)(3x - 5)
C. (3x + 5)(5x + 3)
D. (x + 5)(3x + 5)
Answer: D
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Multiply.4x2(6x7 + 7x3 + 10)
A. 24x9 + 7x3 + 10 B. 24x7 + 28x3 + 40 C. 24x9 + 28x5 D. 24x9 + 28x5 + 40x2
Write interval notation for the graph.
A. [-6, -2] B. (-6, -2] C. [-6, -2) D. (-6, -2)
Determine whether the given point is on the graph of the equation.y = 2x - 3; (6, 9)
A. Yes B. No
Solve the problem.A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 40 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 358 seconds.
A. 0.4893 B. 0.5107 C. 0.0107 D. 0.9893