Add the real numbers. Write any improper fraction as a whole or mixed number where appropriate. -5 + 5
A. 10
B. 0
C. 5
D. -5
Answer: B
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Find the intersection.9x + 8y - 9z = -3, -7x - 5y + 7z = 10
A. x = 11t + 65, y = 0t + 69, z = -11t
B. x = 121t + 65, y = 0t - 69, z = -11t
C. x = -11t - 65, y = 0t + 69, z = -11t
D. x = 11t - 
, y = 0t + 
, z = 11t
Simplify the difference quotients 
and 
for the following function. Rationalize the numerator when necessary.f(x) = 3x3
A. 3x2 + 3xh + 3h2; 9x2 + 9ax + 9a2 B. 9x2 + 9xh + 3h2; 3x2 + 3ax + 3a2 C. 9x2 - 9x - 3h; 3x2 - 3ax - 3a2 D. 3x2 + 3xh + 3h2; 3x2 + 9ax + 9a2
Write the decimal representing the given rational number.
A. 0.266666 . . . B. 0.888888 . . . C. 0.177777 . . . D. 0.727272 . . .
Use the even-odd properties to find the exact value of the expression. Do not use a calculator.sec 
A. 
B. 2
C. - 
D. -2