Perform the indicated operation.Subtract. 3a4 - 18a2
A. 18a4 - 4a2
B. -12a4 - 32a2
C. -44a6
D. -12a4 - 4a2
Answer: B
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Write an algebraic expression to answer the question and simplify.A stack of currency contains 60 bills. In the stack are x $20 bills. The rest are $50 bills. How much money is in the stack of bills?
A. 20x + 50(60 - x); -30x + 3000 dollars B. 20x - 50(60 - x); 70x - 3000 dollars C. 20x + 50(60 - x); 30x + 3000 dollars D. Cannot be solved
Answer the question.What property of real numbers justifies the method of multiplying by the LCD of the parts? Why?
What will be an ideal response?
Write the equation in standard form for an ellipse centered at (h, k). Identify the center and the vertices.6x2 + 5y2 + 20y - 10 = 0
A. C(0, -2); V(±
, -2); 
+ 
= 1
B. C(0, -2); V(0, -2 ± 
); 
+ 
= 1
C. C(-2, 0); V(±2, 
); 
+ 
= 1
D. C(-2, 0); V(-2, ±
); 
+ 
= 1
Evaluate the expression without using a calculator.81-3/2
A. 
B. 729
C. -729
D. - 