Solve the system by substitution.
y = 5,7x + 14.34
y = - 2x - 2.6

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

In the geometric progression –3, 12, −48… what term is 3,072?

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.