Solve the problem.The speed of a stream is 4 mph. If a boat travels 42 miles downstream in the same time that it takes to travel 21 miles upstream, what is the speed of the boat in still water?
A. 15 mph
B. 8 mph
C. 12 mph
D. 14 mph
Answer: C
Mathematics
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Solve the equation.8x + 5 = 4x - 15
A. 5
B. -20
C. - 
D. -5
Mathematics
Match the equation with its graph.y = x(x - 2)
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.Tell whether the statement is true or false. If it is false, give the correct answer. Explain your answer. The easiest way to simplify the expression 
is to multiply both the numerator and denominator by 
What will be an ideal response?
Mathematics
Solve the problem.When students at the local university held a food drive, 320 cans of food were collected on the first day of the drive, 160 the second day, 80 the third day, and so on. Find the total number of cans collected the first five days.
A. 620 cans B. 850 cans C. 630 cans D. 600 cans
Mathematics