Order does not matter so use "n choose k" formula is used to find number of unique combinations.
c=n!/(k!(n-k)!) where n is total possible choices and k is number of selections.
c=4!/(2!(4-2)!)
c=4!/(2!2!)
c=24/(2*2)
c=24/4
c=6
So there are 6 different two topping options when there are four different toppings to choose from.
280 calories Step-by-step explanation: because that is the lowest quartile so that has to be the least number of calories, srry abt the other i didnt know what the options were and 300 looked like the least
D is the answer to the question
55+(x+25)=180
55+x+25=180
25+55+x=180
80+x=180
x=180-80
x=100
Six hundred seven and four hundred nine one-thousandths.
