Calculate.8.86 + 0.77(11)
A. 105.93
B. 17.33
C. 107.09
D. 104.78
Answer: B
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Solve the problems.Two angles are complementary if their sum is 90°. If the measure of the first angle is x°, and the measure of the second angle is (3x - 2)°, find the measure of each angle.
A. 1st angle = 22°; 2nd angle = 68° B. 1st angle = 31°; 2nd angle = 59° C. 1st angle = 22°; 2nd angle = 64° D. 1st angle = 23°; 2nd angle = 67°
Subtract.
- 11
A. 3
B. 19
C. 
D. 
Suppose that in an assortment of 6 calculators, there are 3 with defective switches. Draw with and without replacement. If two machines are selected at random, what is the probability that both have defective switches? ?
A. with : 
, without : 
B. both : 
C. with : 
, without : 
D. both : 
E. none of these
Add or subtract.(r3 - 5rs + 7s2) - (3r3 + rs - 4s2)
A. -3r3 - 5rs + 3s2 B. -2r3 - 4rs + 11s2 C. -2r3 - 6rs + 3s2 D. -2r3 - 6rs + 11s2