Mrs. Davis used 2/5 of her yarn to make 8 hats. She used an equal amount of yarn for each hat. What fraction of her yarn did Mrs. Davis use to make each hat?

Tori examined the pattern of exponents in the table. based on the pattern, which statements are true? check all that apply.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6