Solve. Use interval notation to express the range.On the first four exams, your grades are 78, 89, 66, and 79. You are hoping to earn a C in the course. This will occur if the average of your five exam grades is greater than or equal to 70 and less than 80. What range of grades on the fifth exam will result in earning a C?
A. (28, 78]
B. [28, 78)
C. (38, 88]
D. [38, 88)
Answer: D
Mathematics
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B. 
C. 
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Simplify.32 + 
2
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B. 
C. 
D. 
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Simplify the expression by combining like terms, if possible.6x - 5 + 4x + 3
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A. 1000 mi B. 500 mi C. 2000 mi D. 400 mi
Mathematics