Solve the system by substitution. -4x + 8y = 56 x + 7y = 49
A. No solution
B. (0, 7)
C. (1, 6)
D. (-7, 0)
Answer: B
Mathematics
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Find an equation for the ellipse described. Graph the equation.Vertices at (5, -4) and (5, 8); length of minor axis is 6
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Multiply. Simplify if possible.
? 
? 
A. 
B. 
C. 
D. 
Mathematics
Find the value of the indicated trigonometric function of the angle ? in the figure. Rationalize the denominator where necessary.
Find sin ?.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Bill can row 3 mph in still water. It takes him 3 hours 36 minutes to go 3 miles upstream and return. Find the speed of the current.
A. 3 mph B. 2.5 mph C. 2 mph D. 1.5 mph
Mathematics