For some number to be divisible by 12 it has to be divisible by 6 and by 2. we can write number n as:
n = 6 + 12*k where k is positive integer. If we divide n by 12 we will get remainder 6 because 12*k part is divisible by 12. The part 12*k is as said divisible by 12 which means it is divisible by 6 (as first stated) and it has remainder 0. That leaves us with 6/6 which again has 0 as remainder. That means that number n is divisible by 6
She will have 19.5 cups of purple paint. I couldn’t write the explanation of how you get the answer, but look your question up on Brainly and it’ll give you your explanation.