In Exercises 19-24, solve the equation Determine whether the equation has one solution, no solution . or infinitely many solutions (See Example 3.) 19. 3t+4=12+3t 20. 6d+8=14+3d 21. 2(h+1)=5h-7 22. 12y+6=6(2y+1) 23 3(4g+6)=2(6g+9) 24 5(1+2m)=(1)/(2)(8+20m) ERROR ANALYSIS In Exercises 25 and 26.describe and correct the error in solving the equation. 25. 5c-6=4-3c 2c-6=4 2c=10 c=5

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.