Simplify 9 - 10 a: -19 b: -1 c: 1 d: 19

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

Simplify each expression for 18, 20, and 21