Using the horizontal-line test, determine whether the function is one-to-one.
A. one-to-one
B. not one-to-one
Answer: B
Mathematics
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Use a half-angle identity to find an exact value for the following, given the information about x. Find cos x given that cos 2x = 
and 0 ? 2x < 
.
A. cos x = 7
B. cos x = 
C. cos x = 
D. cos x = 
Mathematics
Is the function graphed below one-to-one?
A. Yes B. No
Mathematics
Solve the problem.A lot is in the shape of a right triangle. The shorter leg measures 120 meters. The hypotenuse is 40 meters longer than the length of the longer leg. How long is the longer leg?
A. 120 m B. 240 m C. 200 m D. 160 m
Mathematics
Find the product.(x - 5y)(x2 + 5xy + 25y2)
A. x3 + 125y3 B. x3 - 125y3 C. x3 + 10x2y2 + 10xy - 125y3 D. x3 - 10x2y2 - 10xy - 125y3
Mathematics