I) 80% x 5640 = Rs. 4512
ii) 4512 divide by 50 = Rs. 90.24
since a square must be the same length on all sides to be a correct square, you can legit just multiply the length of one side times four to get the area.
3.2 x 4 = 12.6
Here is the equation:

Since 4 is next to the parentheses, you have to multiply everything in the parentheses by 4.
First multiply 3x by 4:

Now multiply 2 by 4:

Now add them together:

Your answer is <u>12x + 8</u>
You don't have a graph there so idk if im right but i think its (0,2) and (3,1) plz tell me if im wrong :)