6. (3) $\frac{3}{8}$
There is a slight wording problem that shouldn’t have bothered anyone. Call the chance 15 out of 40 total, express it as a fraction, and reduce to lowest terms.

7. (3) 2x + y = 5
Plug x = 1 and y = 3 into each equation. Only choice three gives a true equality.

8. (3) $3\sqrt{2}$
Simplify $\sqrt{72} \rightarrow \sqrt{(36)(2)} \rightarrow \sqrt{36}\sqrt{2} \rightarrow 6\sqrt{2}$ and then subtract.

9. (2) $\frac{14}{48}$
Tangent is opposite over adjacent. Better, if the angle is at the origin (something like A = (0,0), B = (48,0), and C = (48,14)), then the tangent is the slope of the hypotenuse. You do probably want to sketch the triangle.

10. (1) (1, -4)
Plot each point, see which falls in the doubly-shaded region.

June 19, 2010 pm30 3:45 pm 3:45 pm

Do the answers on the exam then scan the pages. it will be faster.