The formula for perimeter is 2L + 2W and the formula for the area is L * W, since we don't know the width we will divide 35:7 = 5 and he the measurement for the width.
Now just add L + W = 12 and multiply by 2 the answer is 24
Or 2 * 7 + 2 * 5 = 24
The answer is B. You will get that after multiplying 12.99 by 4, and then calculate the tax and add 2.50
7.1+m
Or if you needed to add a variable to be the answer it would be 7.1+m=x
X: # of pairs of socks; y: # of blouses
Then $2.99x+$12.99y=$43.92.
