6. Mike took Jen bowling for the first time. He bowled two games with scores of 157 and 175. Jen had never bowled before and scored 78 and 98. What was Mike's average score? (A) 88 (B) 127 (C) 156 (D) 166

Simplify the Rational Expression $\frac {x^{2}-9}{x^{2}+x-6}$

7. A fair six-sided die is rolled. What are the odds of getting a 3 or higher. Leave your answer as a reduced fraction. $\square $

Find $(2(cos\frac {2\pi }{3}+isin\frac {2\pi }{3}))^{5}$ $-16-16i\sqrt {3}$ $16+16i\sqrt {3}$ $16\sqrt {3}+16i$ $-16\sqrt {3}-16i$

Convert into a complex number: $2(cos\frac {4\pi }{3}+isin\frac {4\pi }{3})$ $-\sqrt {3}-i$ $\sqrt {3}-i$ $-1-i\sqrt {3}$ $1+i\sqrt {3}$

Convert into a polar coordinate: $2\sqrt {3}-2i$ $(4,\frac {7\pi }{6})$ $(-4,\frac {11\pi }{6})$ $(-4,\frac {5\pi }{6})$ $(4,\frac {\pi }{6})$

10. Simplify the expression. $\sqrt {125t^{4}r^{3}s^{13}}$

1. What is the simplified form of $-\sqrt {(y+5)^{16}}$ A. $(y+5)^{8}$ B. $-(y+5)^{8}$ C. $(y+5)^{4}$ D. $-(y+5)^{4}$

Which quadrilateral does not have diagonals that are perpendicular? Rectangle Rhombus Square

Simplify the following expression completely. $\frac {x^{2}-14x+45}{x^{2}-18x+81}$

What is the measure of an exterior angle in a regular 15-gon? Write your answer as an integer or as a decimal rounded to the nearest tenth.