Solve the problem.Let u = 
. Find 5u.
A. 
B. 
C. 
D. 
Answer: C
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Rationalize the denominator of the following expression and then simplify your answer.
?
?
A. 
B. 
C. 
D. 
E. 
Solve the problem.From the top of a vertical tower, 319 feet above the the surface of the earth, the angle of depression to a doghouse is 
How far is it from the doghouse to the foot of the tower? Round your answer to the hundredths place when necessary.
A. 749.7 ft B. 852.3 ft C. 734.11 ft D. 762.1 ft
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.A number multiplied by -4, subtracted from the sum of 19 and eight times the number.
A. 4x - 27 B. 4x - (19 + 8x); -4x - 19 C. (19 + 8x) - (-4)x; 19 + 12x D. (19 + 8x) + (-4)x; 19 + 4x
Graph the ellipse. 49(x + 3)2 + 25(y - 7)2 = 1225
A. 
B. 