8th pre-algebra
This is worth 45 points pls I need help ASAP.

X+ y = 5 ; x - y =3 solve using linear combination

How can you construct perpendicular lines and prove theorems about perpendicular lines

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account. write an expression to represent the total amount in his savings account.