The Grass Doctor

for all u math smarties?

Mr. and Mrs. Green have just moved into a new home and they need to plant grass. their lot is 40 feet by 90 feet and the house is 20 feet by 30 feet. acoriding to the directions on the box of all purpose true blue kentucky grass seed, one box of seed will cover 250 ssquare feet one box costs $1.79 how many boxes do the greens need to buy show all steps

Public Comments

1. total lot area 40x90=3600 house area 20x30=600 lot-house=3000 packets of seed 3000/250=12 12*1.79= $21.48
2. 16,8 boxes
3. Area to be covered = area of property - area of house A = length x height A(lot) = 40 x 90 A(lot) = 3600 A(house) = 20 x 30 A(house) = 600 A(grass) = 3600 - 600 A(grass) = 3000 Numbers of boxes = 3000/250 Number of boxes = 12 price of box is unnecessary to answer this question but if your interested, it would cost (1.79)(12) which is $21.48
4. Area=length times width Area of lot minus area of house=area that needs grass (40*90)-(20*30) 3600-600 3000 square feet that needs to have grass 1 box=250 square feet So if you have 3000 square feet... 3000/250=12 You need 12 boxes. Which will cost 12*$1.79=$21.48 But you didn't ask how much it would cost.
5. okay you would muiltiply 40 by 90 to get the whole lot....then you would subtract the square feet of their house( 20*30) and then you would divide that number by 250 since one box would cover 250 square feet....below is work 40*90=3600 - 20*30=600 +3000 then divide 3000 by 250 so 3000/250 = 12 so 12 boxes total