Find the angle between the given vectors. Round to the nearest tenth of a degree.u = i - j, v = 4i + 5j
A. 96.3°
B. -6.3°
C. 99°
D. 6.3°
Answer: A
Mathematics
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Find the limit 
What will be an ideal response?
Mathematics
Draw the graph of the equation.49x2 + 9y2 = 441
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Gary can hike on level ground 3 miles an hour faster than he can on uphill terrain. Yesterday, he hiked 34 miles, spending 2 hours on level ground and 5 hours on uphill terrain. Find his average speed on level ground.
A. 7
mph
B. 7 mph
C. 4 mph
D. 4
mph
Mathematics
Write a variation equation in the given variables.A group of n people has dinner at a restaurant. The bill for the whole group comes out to $280 and the bill is split equally between all n people. Let f(n) be the amount (in dollars) that each person pays.
A. f(n) = 
B. f(n) = 280n
C. f(n) = 
D. f(n) = 
Mathematics