Translate to an equation, then solve.Twice the difference of four and n is the same as four subtracted from negative one times n.
A. 2(n - 4) = 4 - n, n = 4
B. 2(4 - n) = -n - 4, n = 2
C. 2(4 - n) = -n - 4, n = 12
D. 2(4 - n) = -n - 4, n = 4
Answer: C
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Solve the problem.A company makes three chocolate candies: cherry, almond, and raisin. Matrix A gives the amount of ingredients in one batch. Matrix B gives the costs of ingredients from suppliers X and Y. What is the cost of 100 batches from supplier X? 
A = 
B = 
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A. $6600
B. $4800
C. $7800
D. $3300
Multiply the complex numbers and simplify powers of i.(6 - 9i)(2 + 4i)
A. 48 + 6i B. 48 - 6i C. -36i2 + 6i + 12 D. -24 - 42i
Determine where the function is concave downward.
?
?
A. 
B. 
C. 
D. 
Approximate the square root. Round to the nearest tenth, if needed.
A. 9 B. 9.1 C. 9.2 D. 10.1