Need
3. simplify the expression x^{2} -2x-3/x^{2} -3x-4÷x-3/2x

4. cos (a+b)= cosacosb-sinasinb, then cos (20+60) is what?

Which best describes the transformation that occurs in the graph? a) dilation b) reflection c) rotation d) translation

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319