Here are the answers hope they help
5/5 - 3/5 = 2/5 So the answer would be 2/5 of the cast would not have to sing.
Well first to find out how much the cookies are on sale you do
So on sale each cookie is 40 cents each, now to figure out the normal price add 75 cent to the sale price so:
So that gives us $1.15
So the normal price for the cookies is $1.15 and the sale price is $0.40 cents
Before you can use the reason CPCTC, you need to show that two figures which usually are triangles to be congruent. After showing such, you can then say Corresponding parts of the two congruent figures are also congruent to each other.