Use the FOIL method to find the product. Express the product in descending powers of the variable.(x - 7)(x + 12)
A. x2 + 4x - 84
B. x2 - 84x + 5
C. x2 + 5x + 4
D. x2 + 5x - 84
Answer: D
Mathematics
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Determine which fractions are improper.
, 
, 
, 
, 
A. 
, 
, 
B. 
, 
, 
, 
, 
C. 
, 
, 
, 
D. 
, 
Mathematics
Find the requested value.
{3x + 1 if x < 1 3x if 3 ? x ? 53 - 4x if x > 5
A. 4 B. -9 C. 21 D. 9
Mathematics
Write a system of equations in x and y describing the situation. Do not solve the system.An order of 4 orders of fries, 4 hamburgers, and 2 drinks costs $14. An order of 4 orders of fries, 5 hamburgers, and 4 drinks costs $18. All drinks are $1.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The function f(x) = |x|- 5 is not one-to-one.(a) Find a suitable restriction on the domain of f so that the new function that results is one-to-one.(b) Find the inverse of f.
What will be an ideal response?
Mathematics