Miss Campbell has just bought a rectangular displayboard for her bedroom. It has a length of 90 cm and a width of 50 cm. Miss Campbell would like to put a border of yellow ribbon around the perimeter of her display board.

Area - l*w

area is 4500 cm 2

perimeter - l + w * 2

perimeter is 280 cm

x = 25

step-by-step explanation:

a^2+b^2=c^2

7^2+24^2=c^2

49+576=625

sqrt625=25

x=25

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