To make a trail mix you have 4 cups of pretzels and 2 cups of bread chips .what is the ratio of pretzels t bread chips ?

I'm confused on this could anyone me and show me what i need to do to solve it.

Give the functions f(x) = |x + 2| - 3, what is the domain? a,b,c, or d all real numbers x > 2 x < -2 all real numbers and x cannot equal to 2

Which of the following parabolas opens up?