Rationalize the denominator. Assume that all variables represent non-negative real numbers. Make sure you simplify the final answer.
A. 
B. 
- 
C. 
D. 
Answer: C
Mathematics
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Find an equation of the following curve.A hyperbola centered at the origin having vertex at (0, -5) and eccentricity equal to 2
A. 
- 
= 1
B. 
+ 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Solve the problem.Helen Weller invested $13,000 in an account that pays 11% APR. How much additional money must be invested in an account that pays an APR of 14% so that the total interest is equal to the interest on the two investments at the rate of 12%?
A. $13,000 B. $9,000 C. $6,500 D. $10,000
Mathematics
Solve the equation.4x - 4 = 12
A. 7 B. 4 C. 12 D. 16
Mathematics
Write a numerical expression for the phrase and simplify it.The product of -7 and 7, added to 4
A. (4)(-7 + 7); 0 B. 4 + (-7)(7); -45 C. (-7 + 4)(7); -21 D. (-7)(7)(4); -196
Mathematics