Find an equation of the line passing through the two points. Write the equation in standard form.(10, 9) and (10, 1)
A. x + y = 19
B. x = 10
C. y = 9
D. x + y = 11
Answer: B
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Solve the problem.The Consumer Price Index provides a means of determining the purchasing power of the U.S. dollar from one year to the next. To use the Consumer Price Index to predict a price in a particular year, we can set up a proportion and compare it with a known price in another year as follows: 
= 
.In 1994 the Consumer Price Index was 148.2 and in 2000 it was 172.2. Find the amount that would be charged in 2000 for the use of the same amount of electricity that cost $180 in 1994. Give your answer to the nearest dollar.
A. $204 B. $155 C. $209 D. $200
Solve.If y varies inversely as x, and y = 3 when x = 45, find y when x = 5.
A. 27
B. 3
C. 75
D. 
Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.log2(x + 4) = 3
A. {13} B. {12} C. {4} D. {5}
Indicate whether the statement is true always, sometimes, or never.The difference between two real numbers is a real number.
A. Always B. Sometimes C. Never