Solve the system of linear equations using matrices.
A. (-5, 5)
B. ?
C. (5, -5)
D. (-5, -5)
Answer: C
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Find the LCM of 6 and 4.
A. 12 B. 54 C. 9 D. 24
The following table shows the amount C, in billions of dollars, spent on cell phone service t years after 2000. t 5 6 7 8 C 113.42 126.55 138.13 142.48? ? A: Find the equation of the regression line.B: Plot the data along with the regression line.C: Based on the regression equation, how much would be expected to be spent on cellular service over a 5-year period?D: What amount does the regression line predict for 2011?
What will be an ideal response?
Solve the linear inequality. Express the solution in set-builder notation.4x + 10 < 30
A. {x|x < 5} B. {x|x ? 5} C. {x|x ? 5} D. {x|x > 5}
Simplify where possible. Then solve the equation.2t = 
+ 19
A. t = 8
B. t = 11
C. t = 
D. t = 