Simplify the following by combining like terms.-7r + 12r4 - 7r4 + 10r
A. 8r
B. 8r4
C. 3r + 5r4
D. cannot be simplified
Answer: C
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Find the probability.In a blood testing procedure, blood samples from 5 people are combined into one mixture. The mixture will only test negative if all the individual samples are negative. If the probability that an individual sample tests positive is 0.08, what is the probability that the mixture will test positive?
A. 1.00 B. 0.341 C. 0.659 D. 0.00000328
Solve the problem.Find the value for x in the following special right triangle. Use exact values. 
4 in.
A. 16 in.
B. 2 in.
C. 4
in.
D. 4 in.
Find the missing parts of the triangle. A = 103.8°a = 1257 cmb = 1357 cmIf necessary, round angles to the nearest tenth and side lengths to the nearest cm.
A. B = 36.7°, C = 39.5°, c = 1551 cm B. no such triangle C. B = 39.5°, C = 36.7°, c = 1551 cm D. B = 32.8°, C = 43.4°, c = 1551 cm
Solve the absolute value equation or indicate that the equation has no solution.
= 0
A. {-6, 0, 6} B. {-6, 0} C. {0, 6} D. ?