standard_description: Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.
problem_activity: Problem 1
Claudia is redecorating her bedroom, which is in the shape of a rectangle that is 8 feet long and 9 feet wide. She needs to buy new carpeting and wants to put baseboards around the border of her bedroom.
a.   How much carpeting should Claudia order?
b.   How much baseboard should Claudia order?
Problem 2
The length of a rectangle is 6 cm and its perimeter is 16 cm. What is the area of the rectangle in square centimeters?


aligns: no