Solve the system of equations graphically using a graphing calculator. Find all values to the nearest tenth.y = 2x + 4xy = -2
A. x = 0.4, y = 4.8; x = -2.4, y = -0.8
B. x = 0.4, y = 4.8
C. x = -1.0, y = 2.0
D. No solution
Answer: C
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Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = 
A. not one-to-one
B. f-1(x) = 
C. f-1(x) = (x + 4)2
D. f-1(x) = x2 - 4, x ? 0
Multiply the real numbers. Write any improper fraction as a whole or mixed number where appropriate.-3
? 7
A. -147
B. -21
C. -10
D. -26
Solve the problem.A hot dog stand sells hot dogs with cheese, relish, chili, tomato, onion, mustard, or ketchup. How many different hot dogs can be concocted using any 5 of the extras?
A. 1260 B. 21 C. 2520 D. 42
Factor completely. State that the polynomial is prime if it cannot be factored.64x2 - 49
A. (8x + 7)(8x - 7) B. prime C. (8x + 7)2 D. (8x - 7)2