Factor the expression using the GCF.

26x−13

Three times the sum of a number and seven is negative thirty-six. what is the number?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

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.