Solve the system by the substitution method or the addition method.
A. 
B. 
C. (2, -3)
D. 
Answer: B
Mathematics
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Factor the polynomial completely.15x2 + 4xy - 4y2
A. (15x + 2y)(x - 2y) B. (3x + 2y)(5x - 2y) C. (3x - 2y)(5x + 2y) D. prime
Mathematics
Express the solution set of the inequality in interval notation.x < 6
A. (-?, 6) B. (-?, 6] C. (6, ?) D. [6, ?)
Mathematics
Find the foci of the given hyperbola.
- 
= 1
A. (-1, -21), (-1, 19) B. (-1, -13), (-1, 11) C. (2, 19), (2, -21) D. (-13, -1), (11, -1)
Mathematics
Solve the problem.The distance D, in feet, it takes a car travelling at x mph to come to a full stop after hitting the brakes is given by 
What is the stopping distance for a car travelling at 30 mph?
A. 115.2 ft B. 76.8 ft C. 1200 ft D. 1153.71 ft
Mathematics