Yellow rectangles= X Yellow squares = positive Red squares = negative 1) 5x – 3 = 7
2) 3x + 4 = -2
3) 3x + 6 = -9
4) 2x - 4 = 14
5) 3x – 4 = 8
6) 4x + 7 = 11

The large squares represent X squared, and had two sides, blue and red, to determine whether it is positive or negative (blue = positive, red = negative). There is also the long rectangles that represent X, with the positive side being green and the negative red. The side length of X is the same side length of X squared, which makes sense because X multiplied by X equals X squared. The smallest square pieces represent the number 1. The colours are yellow for positive and red for negative. These are the basic pieces used in algebra tiles. Hope this helps

Step-by-step explanation:

450 is the final answer! : )

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1