Solve the system of equations using Cramer's Rule if it is applicable. If Cramer's Rule is not applicable, say so.
A. x = 9, y = 5, z = 9; (9, 5, 9)
B. x = 7, y = 7, z = 5; (7, 7, 5)
C. x = 6, y = -9, z = -5; (6, -9, -5)
D. x = 6, y = 9, z = 5; (6, 9, 5)
Answer: D
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Use the method of Gauss to find the sum.1 + 2 + 3 + . . . + 1000
A. 250,000 B. 500,500 C. 1,002,001 D. 500,000
Find the probability.Each of ten tickets is marked with a different number from 1 to 10 and put in a box. If you draw a ticket from the box, what is the probability that you will draw 7, 8, or 1?
A. 
B. 
C. 
D. 
Solve and check your answer.
- 4 = 
A. 15 B. 20 C. 30 D. 12
Provide an appropriate response.Suppose that a simple economy consists of three sectors: agriculture (A), manufacturing (M), and transportation (T). Economists have determined that to produce one unit of A requires src="https://sciemce.com/media/4/ppg__tttt0616191201__f1q59g5.jpg" style="vertical-align: -17.0px;" /> units of M, and 
units of A, 
units of B, and 
units of T, while production of one unit of M requires 
units of A, 
units of T, and production of one unit of T requires 
units of A, 
units of M, and 
units of T. There is an external demand for 20 units of A, 40 units of M, and 10 units of T. Determine the production levels necessary to meet the external demand.
What will be an ideal response?