No calculator allowed: which of the following numbers are in the range of f if f(x) = 2x-1 / x+1.
[part of question] : i. -1
ii. 1
iii. 2

i kind of understand but it's tough without a calculator (for me at least). how would you solve these without a calculator?

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?