Solve.Stephen can exempt his math exam if he has a test average greater than or equal to 71 on the five tests in the course. His current test scores are 78, 54, 78, 91. Using trial and error, determine the minimum score on the last test that will give him an average of 71.
A. 70
B. 54
C. 91
D. 71
Answer: B
Mathematics
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Solve the problem.Assume that the mathematical model C(x) = 19x + 170 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured if the cost is to be kept between $739,000 and $1,100,000?
A. {x 
570 < x < 760}
B. {x 
600 < x < 800}
C. {x 
380 < x < 570}
D. {x 
400 < x < 600}
Mathematics
Provide an appropriate response.Solve the system of equations using the substitution method: 3a - b = 3 a + b = 5
A. a = 3, b = 2 B. a = 4, b = 9 C. a = 4, b = 1 D. a = 2, b = 3
Mathematics
Determine whether the statement is true or false.
2 + 
2= 
2
A. False B. True
Mathematics
Evaluate the expression.(-x)0 when x ? 0
A. 1 B. -1 C. x D. 0
Mathematics