First estimate the answer. Then add or subtract to find the exact answer. Write answer as a mixed number. 
A. Estimate: 12; Exact: 17
B. Estimate: 13; Exact: 13
C. Estimate: 12; Exact: 12
D. Estimate: 13; Exact: 12
Answer: C
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Find, if possible, the number of elements in sets A, B, and C using the given information.n(A ? B ? C) = 21n(A ? B) = 4n(A ? C) = 5n(A - B) = 6n(C ? B) = 8n(A ? B ? C) = 2n(C - (A ? B)) = 2
A. n(A) = 8, n(B) = 15, n(C) = 13 B. n(A) = 8, n(B) = 11, n(C) = 15 C. n(A) = 10, n(B) = 13, n(C) = 13 D. The information is inconsistent or incomplete.
Find the measure of the angle.
?EGB
A. 95° B. 110° C. 105° D. 100°
Find the x-intercept and y-intercept, then graph the equation.5x - 25y = 0
A. (0, 0), (0, 5)
B. (0, 0)
C. (0, 0), (0, -5)
D. (0, 0)
Find the unit rate.1750 people in 50 buses
A. 0.029 person/bus B. 1700 people/bus C. 350 people/bus D. 35 people/bus