Add, subtract, or multiply, as indicated. Express your answer as a single polynomial in standard form.(3x - 10)(9x + 1)
A. 12x2 - 87x - 10
B. 12x2 - 87x - 87
C. 27x2 - 87x - 10
D. 27x2 - 87x - 87
Answer: C
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Solve the differential equation subject to the initial conditions.2 
- 4xy = 8x; y = 3 when x = 0
A. y = 2 + 3ex2 B. y = -1 + 4ex2 C. y = -2 + 5e-x2 D. y = -2 + 5ex2
Solve the problem.Suppose the monthly total revenue for manufacturing baseball bats is R(x) = 26.00x, where x is the number of bats sold each month. Find and interpret the marginal revenue for the product.
A. $260 per bat; The revenue will increase by $260 for each additional bat sold in a month. B. -$2.60 per bat; The revenue will decrease by $26.00 for each additional bat sold in a month. C. $26.00 per bat; The revenue will increase by $26.00 for each additional bat sold in a month. D. $2.60 per bat; The revenue will increase by $2.60 for each additional bat sold in a month.
Solve the equation.x + 
= -7
A. -30 B. -10, 3 C. -7, -30 D. 10, -3
Use a calculator to find a graphical solution to the equation. Express results to the nearest thousandth.x2 + 9x = -7
A. -0.86, -8.14 B. 0.72, -9.72 C. -5.36, -5.36 D. 8.14, 0.86