Perform the indicated operations and simplify the expression.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: C
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Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = -3 B. x = 3 C. x = 0 D. none
First, use front end rounding to estimate each answer. Then find the exact answer.A certain town receives 303 days of rain a year. On average, how many days a year does it not rain?
A. estimate: 370 - 300 = 70 days; exact: 365 - 303 = 62 days B. estimate: 400 - 303 = 97 days; exact: 365 - 303 = 62 days C. estimate: 400 - 300 = 100 days; exact: 365 - 303 = 62 days D. estimate: 365 - 300 = 65 days; exact: 365 - 303 = 62 days
Find a value for K so that the following system of equations 
has infinitely many solutions.
Fill in the blank(s) with the appropriate word(s).
Solve the problem.Elissa wants to set up a rectangular dog run in her backyard. She has 50 feet of fencing to work with and wants to use it all. If the dog run is to be x feet long, express the area of the dog run as a function of x.
A. A(x) = 26x - x2 B. A(x) = 25x - x2 C. A(x) = 27x2 - x D. A(x) = 24x - x2