Use matrix addition to solve this equation:

C =
3 1 0
−1 2 4
9 7 −2
+
5 2 −4
1 12 3
11 3 −2
c11 =

c31 =

c22 =

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.