Solve the system graphically.x + 7y = 77x - 4y = -4
A. (1, 0)
B. (0, 1)
C. (1, 1)
D. (0, 0)
Answer: B
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Solve the inequality. Graph your solution on a number line, and write your solution in interval notation.-5 < 4x + 3 ? 11
A. [-2, 2]
B. (-2, 2]
C. (-2, 2)
D. [-2, 2)
Solve the problem.Suppose that P(x) represents the percentage of income spent on housing in year x and I(x) represents income in year x. Determine a function H that represents total housing expenditures in year x.
A. H(x) = (I - P)(x)
B. H(x) = (
)(x)
C. H(x) = (P ? I)(x)
D. H(x) = (P + I)(x)
Solve the exponential equation below.
?
?
A. 
B. 
C. 
D. 
E. 
Find the maximum and minimum values of the function and the values of x and y for which they occur.F = 8x + 12y, subject to40x + 80y ? 560,6x + 8y ? 72,x ? 0,y ? 0.
A. Maximum: 100 when x = 8 and y = 3; minimum: 0 when x = 0 and y = 0 B. Maximum: 96 when x = 12 and y = 0; minimum: 84 when x = 0 and y = 7 C. Maximum: 96 when x = 12 and y = 0; minimum: 0 when x = 0 and y = 0 D. Maximum: 100 when x = 8 and y = 3; minimum: 84 when x = 0 and y = 7