Solve the problem.One Internet service provider has the following rate schedule for high-speed Internet service:Monthly service charge$18.001st 50 hours of usefreeNext 50 hours of use$0.25/hourOver 100 hours of use$1.00/hourWhat is the charge for 50 hours of high-speed Internet use in one month?What is the charge for 75 hours of high-speed Internet use in one month?What is the charge for 135 hours of high-speed Internet use in one month?
Fill in the blank(s) with the appropriate word(s).
$18.00
$24.25
$65.50
Mathematics
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Use the quadratic formula to solve the equation.x2 + 12x + 21 = 0
A. {-6 - 
, -6 + 
}
B. {-12 + 
}
C. {6 + 
}
D. {6 - 
, 6 + 
}
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Convert the temperature algebraically. Round the answer to one decimal place.17°C to Fahrenheit
A. 62.6°F B. 28°F C. -1.4°F D. -7.6°F
Mathematics
Find the following.Find -(-x) when x is 122.
A. -122
B. 0
C. 
D. 122
Mathematics
Solve. Round to the nearest percent if necessary.Enrollment in a class at a local college increased from 180 to 306. What was the percent of increase?
A. 41% B. 126% C. 70% D. 170%
Mathematics