Solve the problem.The table shows the number of new AIDS cases (in thousands) in the U.S. in five consecutive years.
Let x = 1 correspond to 1988 and let f(x) be the number of new AIDS cases (in thousands) in the U.S. in year x. Using the points 
and 
the following linear function is obtained to model the data: 
Compare the number of new AIDS
cases given by the model in 1990 with the actual number of new AIDS cases that year. How accurate is the model?
What will be an ideal response?
The model gives 38,350 new cases in 1990 while the actual number of new cases that year is 41,800. the estimate given by the model is about 8% too low.
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Solve.How long a bolt is needed to go through tubing 
in. long, a washer 
in. thick, and a nut 
in. thick? Reduce the answer to lowest terms.
Fill in the blank(s) with the appropriate word(s).
Indicate whether the statement is true always, sometimes, or never.The product of a pair of complex conjugates is a real number.
A. Sometimes B. Always C. Never
The results of a mathematics examination are given. Write the ratio in lowest terms.Results: 6 A's, 5 B's, 9 C's, 3 D's, 2 F'sA's to B's
A. 6 : 5 B. 1 : 1 C. 6 : 1 D. 5 : 6
Answer true or false.If the two equations in a system of linear equations are added and the result is 
the system has no solution.
A. False B. True