Solve using Cramer's rule. 5x - 7y - z = -28 x - 9y + 5z = -12-4x + y + z = -8
A. (6, -7, -9)
B. (6, 7, 9)
C. (7, 9, 7)
D. (7, 5, 9)
Answer: B
Mathematics
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Evaluate the integral by using multiple substitutions.
dx
A. 
+ C
B. 
+ C
C. 
+ C
D. 
+ C
Mathematics
Find all possible functions with the given derivative.y' = 1 + 
A. y = x - 
+ C
B. y = 6 ln 
+ C
C. y = x + 6 ln 
+ C
D. y = - 
+ C
Mathematics
Use addition, subtraction, or multiplication to solve the problem.The list price of a car is $15,133. The manufacturer offers a rebate of 
What is the final price of the car?
A. $14,550 B. $15,616 C. $15,716 D. $14,450
Mathematics
x? = x(0.05 ? 0.002x ? 0.0015y) , y? = y (0.03? 0.0025x ? 0.0003y) , x (0) = 3, y (0) = 5
For the systems of differential equations, use Euler’s method with ?x = 2 to plot the trajectory of x and y to plot the trajectory for 0 ? t ? 500
Mathematics