Question

Jake paints all sides except the bottom of the box length=20cm width=15cm height=12

I need a expression?

Answer 1

Area Painted = (2*12*15) + (2*20*12)

Explanation:

If you imagine a box, you know that the bottom area would be found by multiplying the length by the width. Thus, the only other area you want to find are the sides of the box. I multiplied the length and the height as well as the width and the height. I multiplied that by 3 because there's two sides that are always going to be the same. I recommend you draw a picture before attempting to write an expression,

Hope this helped :)