Solve the system of equations by elimination.x + y = -8x - y = 13
A. (8, -10.5)
B. (2.5, -10.5)
C. (2.5, 10.5)
D. (8, 2.5)
Answer: B
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Solve the differential equation subject to the given condition. Note that y(a) denotes the value of y at t = a. 
= -6y, y(0) = 15
A. y = 6e-15t B. y = e-6t + 15 C. y = 15e-6t D. y = -15e6t
Divide. Leave your answer in exponent form. Assume that all variables in any denominator are nonzero.
A. g6 - g B. g5 C. 6 D. g7
Evaluate the exponential form.60
A. -1 B. 1 C. 0 D. 6
Graph the region that satisfies the constraints.A contractor builds two models of homes, the Raskolnikov and the Karamazov. The Raskolnikov requires 180 worker-days of labor and $300,000 in capital, while the Karamazov requires 270 worker-days of labor and $200,000 in capital. The contractor has a total of 5400 worker-days and $6,000,000 in capital available per month. Let x represent the number of Raskolnikov models and y represent the number of Karmazov models.
A. 
B. 
C. 
D. 