Solve the equation.
+ 9 = x + 5
A. {-4}
B. {2, 8}
C. {8}
D. 
Answer: C
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Add the polynomials. Express your answer in standard form.(9x + 2) + (3x + 3)
A. 12x B. 17x C. 12x2 + 5 D. 12x + 5
A computer password is made up of four characters. Each character can be a capital letter (A through Z), a lowercase letter (a through z) or a digit (0 through 9).How many passwords have 2 letters (uppercase or lowercase) and 2 digits?
A. 52 × 51 × 10 × 9 B. 6 × 522 × 102 C. 2 × 522 × 102 D. 522 × 102 E. none of these
z = f (x, y) = y2/ x; a = 9, b = 3, x = 2.71, y = 4.05
For the following functions, use linearization and the values of z, 
at (a b) to estimate z (x, y) .
Solve.In a distant galaxy the gravity of planet A is 216 times as strong as the gravity of planet B, so objects on planet A weigh 216 times as much as they weigh on planet B. If the object weighs 
on planet A, how much does it weigh on plant B?
A. 1600 lb. B. 153 lb. C. 170 lb. D. 160 lb.