Simplify the algebraic expression.-7x + 3(4x - 7)
A. 19x + 21
B. 5x + 21
C. 19x - 21
D. 5x - 21
Answer: D
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Solve by the method of elimination by addition or subtraction. 9x - 6y = -30 2x + 4y = 20
A. x = 0, y = 6 B. x = 0, y = 5 C. x = -1, y = 6 D. Inconsistent
Find the center (h, k) and radius r of the circle with the given equation. (x - 6)2 + y2 = 64
A. (h, k) = (6, 0); r = 64 B. (h, k) = (6, 0); r = 8 C. (h, k) = (0, 6); r = 64 D. (h, k) = (0, 6); r = 8
Determine whether the infinite geometric series converges or diverges. If it converges, find its sum.2 + 1 + 
+ 
+ . . .
A. Converges; 3 B. Converges; 4 C. Converges; 1 D. Diverges
Find a and k and then evaluate the function. Round your answer to three decimal places when necessary.f(x) = 
with f(0) = -2 and f(2) = -4. Find f(1).
A. a = -12, k = 
ln 
, f(1) = -2.899
B. a = -20, k = 
ln 
, f(1) = -2.899
C. a = 12, k = 
ln 
, f(1) = 2.400
D. a = -20, k = 
ln 
, f(1) = 1.739