Solve the system of equations by substitution.
x+y=18
y=8x

Which best explains why this triangle is or is not a right triangle?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

How do i put 3(x+7) in distributive property