Solve the problem.The revenue achieved by selling x graphing calculators is figured to be 
The cost of each calculator is 
How many graphing calculators must be sold to make a profit (revenue - cost) of at least $312.80?
A. {x ? 14 < x < 26}
B. {x ? 36 < x < 44}
C. {x ? 34 < x < 46}
D. {x ? 35 < x < 33}
Answer: C
Mathematics
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Estimate the sum or difference by first rounding each value to the indicated place value. Then find the actual sum or difference.236.85 + 8 + 15.743
round each to the nearest one
A. Estimate: 259; Actual: 260.593 B. Estimate: 261; Actual: 260.593 C. Estimate: 259; Actual: 261.593 D. Estimate: 261; Actual: 261.593
Mathematics
Multiply.9(-1)(6)(-6)
A. -324 B. 9 C. 324 D. 45
Mathematics
Use the given conditions to find an equation in slope-intercept form of each of the nonvertical lines. Write vertical lines in the form x = h.Parallel to y = 0; passing through (3, 5)
A. x = 3 B. y = 5 C. x = -5 D. y = -3
Mathematics
Find the slope of the line.4x - 5y = 18
A. - 
B. 
C. - 
D. 
Mathematics