Simplify, leaving exponents in the answer.
3
A. 
B. 
C. 
D. 
Answer: A
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Solve the system of equations by Gaussian elimination. If there is an unlimited number of solutions, find two of them.6x + 9y = 9-2x - 4y = -4-8x + 9y = 9
A. x = -1, y = 2 B. Inconsistent C. x = 0, y = 1 D. Unlimited: x = -1, y = 2; x = 0, y = 1
Simplify.5(6r2 - 9r - 3) - 2(4r2 + 3r + 6)
A. 22r2 - 51r - 27 B. 38r2 - 51r + 27 C. 22r2 + 39r + 27 D. -22r2 + 39r - 27
In real estate, a house's selling price P is found by adding the real estate agent's commission C to the amount A that the seller of the house receives: 
Rachel's house sold for $360,000. Her real estate agent received a commission of $25,200. How much did Rachel receive?
A. $334,800 B. $385,200 C. $334,700 D. $334,900
Find the equation of a circle satisfying the given conditions.Center: (-7, 0); radius: 
A. x2 + (y + 7)2 = 289 B. x2 + (y - 7)2 = 289 C. (x + 7)2 + y2 = 17 D. (x - 7)2 + y2 = 17