Use cross multiplication to determine whether the pair of fractions is equivalent.
A. 50 ? 18; No
B. 60 = 60; Yes
C. 30 = 30; Yes
D. 15 ? 60; No
Answer: C
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Solve the system.x2 - y2 = 39x - y = 3
A. {(-8, -5)} B. {(8, -5)} C. {(-8, 5)} D. {(8, 5)}
Using the pair of parametric equations, find the values of A and B in the table.x = -4t - 6, y = t + 5, for 0 ? t ? 7
A. A = 9, B = -18 B. A = 4, B = -18 C. A = 4, B = 8 D. A = -18, B = 9
Solve the problem.Roberto invested some money at 8%, and then invested $4000 more than twice this amount at 9%. His total annual income from the two investments was $2960. How much was invested at 9%?
A. $12,000 B. $2400 C. $20,000 D. $24,000
Determine the degree of each term of the polynomial.12x4 - 7w3 + 3w - 4y5 + 3
A. 12x4: degree 48; -7w3: degree -21; 3w: degree 1; -4y5: degree -20; 
B. 12x4: degree 12; -7w3: degree -7; 3w: degree 3; -4y5: degree -4; 
C. 12x4: degree 4; -7w3: degree 3; 3w: degree 1; -4y5: degree 5; 
D. 12x4: degree 4; -7w3: degree 3; 3w: degree 1; -4y5: degree 5; 