Rewrite the expression without the grouping symbols.-(a + 4b)
A. -a - 4b
B. a - 4b
C. -a + 4b
D. -4ab
Answer: A
Mathematics
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Complete the square to write the equation in the form 
- 
= 1 or 
- 
= 1. x2 - y2 - 6x + 6y - 1 = 0
A. 
- 
= 1
B. (x - 3)2 + (y - 3)2 = 1
C. (y - 3)2 - (x - 3)2 = 1
D. (x - 3)2 - (y - 3)2 = 1
Mathematics
Solve the system using the inverse method.
A. x = 0, y = -2, z = -5 B. x = 44, y = 6, z = 1 C. x = -14, y = 61, z = 4 D. x = -24, y = 28, z = -7
Mathematics
Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers.y1/3(y4/9 - 9y2/9)
A. y3/4 - 9y3/2 B. y4/27 - 9y2/27 C. y-1/9 - 9y1/9 D. y7/9 - 9y5/9
Mathematics
Solve.m - 
= 
A. - 
B. 
C. 
D. 
Mathematics