Choose the graph that matches the equation.z = 1 - x - 2y
A. 
B. 
C. 
D. 
Answer: D
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Place the correct symbol, < or >, in the blank between the whole numbers.0 
44
A. < B. >
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).
Solve the problem.If $2000 is invested in an account that pays interest compounded continuously, how long will it take to grow to $7100 at 6.75%?
A. 18.8 yr B. 10.3 yr C. 12.6 yr D. 7.9 yr
Solve the problem.A plumber charges a fixed rate plus an hourly rate to do house calls. The ordered pair (3, 81) indicates total charges of $81 for a job taking 
and the ordered pair 
indicates total charges of $151 for a job taking 8 hours.a) Write a linear equation giving the total charges, y, in terms of the number of hours x.b) Use the equation found in part a to find how much it costs for 5 hours.c) How many hours would result in a total charge of $137?
A. y = 14x + 39; $109; 7 hours B. y = 14x + 39; $70; 7 hours C. y = 14x; $70; 7 hours D. y = 14x + 39; $109; 9 hours