Find 
.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: E
Mathematics
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Solve by the substitution method.9x - 7y = 417x + 5y = 11
A. (3, -2) B. (3, -1) C. (41, 11) D. (2, -1)
Mathematics
Use graphs to find the set.(7, ?) ? [10, ?)
A. (-?, ?) B. (7, 10] C. (7, ?) D. [10, ?)
Mathematics
Solve the problem.Bill swims at a speed of 6.7 mph in still water. The river he's in flows at a speed of 2.1 mph. How long will it take Bill to swim 2.7 mi upstream? Round your answer to the nearest tenth of an hour, if necessary.
A. 0.6 hr B. 12.4 hr C. 1.7 hr D. 0.3 hr
Mathematics
Evaluate the expression for the given value or values of the variables.-
; m = -4, n = 6
A. 1 B. 3 C. -2 D. -6
Mathematics