The length of the diagonal across the side of a rectangular box is 16 centimeters, and the length of the diagonal across the top of the box is 18 centimeters. The length of the three-dimensional
diagonal is 20 centimeters. What is the length of the diagonal across the front of the box?

step-by-step explanation:

it's is b

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart