Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.2-4
A. 
B. 
C. -16
D. 16
Answer: B
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Divide.(x2 + 4x - 21) ÷ (x + 7)
A. x2 + 5x - 14 B. x + 3 C. x - 3 D. x2 - 3
Answer the question about the given function.Given the function f(x) = 3x2 + 6x + 1, is the point (-2, 7) on the graph of f?
A. Yes B. No
Let x represent one number and let y represent the other number. Use the given conditions to write a system of nonlinear equations. Solve the system and find the numbers.The difference between the squares of two numbers is 112. Twice the square of the second number subtracted from the square of the first number is 
. Find the numbers.
A. 11 and 3, -11 and 3, or 11 and -3 B. 11 and 3 C. 11 and 3, -11 and 3, 11 and -3, or -11 and -3 D. 11 and 3 or -11 and -3
Solve the problem.A cable TV company charges $25 for the basic service plus $5 for each movie channel. Let y be the total cost in dollars of subscribing to cable TV, using x movie channels. What is the fixed cost?
A. $5 B. $25 C. -$5 D. No fixed cost