Solve the problem. Round to the nearest tenth, if necessary.Megan drove her car 9 miles north, then made a left turn and drove 5 miles west. How far is she, in a straight line, from her starting point?
A. 7 mi
B. 53 mi
C. 10.3 mi
D. 5.15 mi
Answer: C
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Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.x2 ? x7
A. x14 B. 14x C. x9 D. 9x
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = 
, 0 < ? < 
Find cos(2?).
A. - 
B. - 
C. 
D. 
Find the special product using the appropriate formula.(9x - 4)2
A. 9x2 + 16 B. 81x2 - 72x + 16 C. 81x2 + 16 D. 9x2 - 72x + 16
Find values of x, y, and ? that satisfy the system. These systems arise in certain optimization problems in calculus, and ? is called a Lagrange multiplier.
?
?
?
A. ?x = 24, y = -49, ? = 24 B. ?x = -49, y = 48, ? = -49 C. ?x = 24, y = 48, ? = -49 D. x = 24, y = -49, ? = -49 E. ?x = 24, y = 48, ? = 48