The decay factor of an exponential function 
is 0.74. The initial value is 1.5. Then a formula for P is
?
A. ?
B. ?
C. ?
D. 
Answer: D
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Place parentheses, if needed, to turn this into a true statement.8 - 10 - 9 + 3 = 10
A. 8 - (10 - 9) + 3 = 10 B. No parentheses needed C. 8 + 10 - (9 + 3) = 10 D. (8 - 10) - 9 + 3 = 10
Solve the problem.Assume that the sales of a certain appliance dealer are approximated by a linear function. Suppose that sales were $6500 in 1982 and $90,000 in 1987. Let 
represent 1982. Find the equation giving yearly sales S(x).
A. S(x) = 16,700x + 90,000 B. S(x) = 83,500x + 6500 C. S(x) = 16,700x + 6500 D. S(x) = 83,500x + 90,000
Let x be a number. Translate the English phrase or sentence into a mathematical expression. 55 decreased by a number
A. 55 - x B. 55 ÷ x C. x - 55 D. 55 + x
Use the Gauss-Jordan method to solve the system of equations.9w + 7x - 5y - 2z = -218w + 5x - 8y - 2z = -299w + 7x + 6y + 3z = 18-5w - 2x + 7y + 9z = 15
A. (2, -3, 4, -1) B. (2, 3, -4, -2) C. (-1, 4, -5, 2) D. No solution