Solve by graphing.The cost y (in hundreds of dollars) of tuition at one community college is given by the linear equation 
where x is the number of credits for which a student registers. Graph the equation and use the graph to estimate the cost of tuition if a student registers for 14 credits. 
A. $2900
B. $2500
C. $1700
D. $1950
Answer: D
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Multiply and simplify. Assume that all variables represent nonnegative numbers.
(
+ 
)
A. 
+ 
B. 15
C. 
D. 5 + 
Solve the system using the addition method. If the system is inconsistent and has no solution, state this. If the system is dependent, write the form of the solution for any real number x.
x - 
y = -18
x + 
y = -9
A. Inconsistent, ?
B. (-12, 0)
C. (12, 0)
D. Dependent, 
Provide an appropriate response.While solving an equation, why can't you multiply both sides of the equation by zero?
What will be an ideal response?
Write a system of linear equations that models the situation. Do not solve.If 6 boxes of chocolate-covered almonds and 8 soft drinks cost 
and 2 boxes of chocolate-covered almonds and 7 soft drinks cost 
, find the price of a box of chocolate-covered almonds and the price of a soft drink.
A. 6x + 7y = 26 8x + 2y = 13 B. 8x + 6y = 26 2x + 7y = 13 C. 6x + 2y = 26 8x + 7y = 13 D. 6x + 8y = 26 2x + 7y = 13