Determine whether the lines are parallel, perpendicular, or neither.7x + 9y = -15
x + y = -13
A. parallel
B. perpendicular
C. neither
Answer: A
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Perform the indicated operations and, if possible, simplify. Recall that multiplications and divisions are performed in order from left to right.
? 
÷ 
A. 
B. 
C. 1
D. 
Determine, without graphing, whether the given quadratic function has a maximum value or a minimum value and then find that value.f(x) = -x2 + 2x + 1
A. maximum; 2 B. minimum; 2 C. maximum; 1 D. minimum; 1
Determine whether the function is periodic. If it is periodic, find the period.f(x) = 9 sin3 x
A. 4? B. Not periodic C. ? D. 2?
Solve the problem.A local phone company charges a connection fee of $1.51 plus $0.41 per minute for each phone call. If we let x represent the number of minutes spent on the phone, the equation that gives the cost (y) of each phone call can be represented by 
Find the y-intercept of this equation, and explain what it signifies.
A. (0, 0.41); The charge per minute for each phone call. B. (0, 0.41); The connection fee for each phone call. C. (0, 1.51); The charge per minute for each phone call. D. (0, 1.51); The connection fee for each phone call.