Solve.By switching service providers, a family's telephone bill decreased from about $50 a month to about $47. What was the percent of decrease?
A.
| 3% |
B. 6.4%
C. 7%
D. 6%
Answer: D
Mathematics
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Determine whether or not the function f(x) = -2x² + 18x - 16 is one-to-one.
What will be an ideal response?
Mathematics
Use set-builder notation to describe all real numbers satisfying the given conditions.If the quotient of seven times a number and four is increased by 4, the result is at least 38.
A. 
or 
B. 
or 
C. 
or 
D. 
or 
Mathematics
Factor by grouping.2y - 8 + xy - 4x
A. (x - 4)(2y + x) B. (y - 4)(2 + x) C. (x - 4)(y + 2) D. (y - 4x)(2 + x)
Mathematics
For the given functions f and g, find the requested composite function value.f(x) = 2x + 2, g(x) = 4x2 + 3;
Find (g ? g)(1).
A. 10 B. 16 C. 67 D. 199
Mathematics