Solve this system using any method (substition elimination) !
x - y = -3
-4x + y = -18

Me #1 using vocabulary words, including the word “congruent”, state why the measure of angle d is 120 degrees. #2 what is the measure of angle e and why?

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Factor the expression using the gcf. the expression 21m−49n factored using the gcf