You are choosing two scoops of ice cream to go on a cone out of 32 possible flavors. if all you care is what flavors end up on your cone (and not what order they are scooped in) which calculation would you use to calculate the number of possible outcomes?

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation:

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: