Perform the following operations and prove closure. 1. (x)/(x+3) + (x+2)/(x+5)

2. (x+4)/(x^2+5x+6) * (x+3)/(x^2-16)

3. (2)/(x^2-9) - (3x)/(x^2-5x+6)

4. (x+4)/(x^2-5x+6) / (x^2-16)/(x+3)

Which statement is true 1.the pythagorean theorem can be used to find the missing side of any triangle 2.the pythagorean theorem can be used to find the missing side of any polygon 3. the pythagorean theorem can be used to find the missing side of any right triangle 4.the pythagorean theorem can be used to find the missing side of any isosceles triangle

What is negative 3/9 times negative 2/8 ?

Alice is paying her bill at a restaurant. but tax on the cost of a male is 5%. she decides to leave a tip 20% of the cost of the meal plus the tax