Solve the system of equations 3x + y = 3 and 7x + 2y = 1.
1 Solve for the variable y in the first equation: y = 3 - 3x
2. Substitute the value for y into the second equation: 7x + 2(3 - 3x) = 1
3. Solve for x

Cindy uses 1-inch cubes to find the volume of a jewelry box shaped like a rectangular prism. she uses 780 cubes to completely fill the jewelry box with no gaps or overlaps. if the jewelry box is 13 inches long and 5 inches wide, how tall is cindy’s jewelry box?

True or false look at the picture pls : /

Ineed me i stuck and i don’t want to get it wrong