90 minutes = 1.5 hrs
45 minutes = 0.75 hrs
8*5 - (1.5 + 0.75 + 2.5 )
40 - 4.75
35.25 = 35 1/4 hours = 35 hours and 15 minutes
Jen and jacob want to put a cement deck around their pool. if the cement cost $4.75 per square foot, how much is the cost of the deck? round to the nearest hundreth.
3 answers
Wrong answer
Width of pool is x+3
Length of pool is 3x-4
Width of deck is 3x-2
Length of deck is 2x+6
area= (2x+6)(3x-2) - (3x-4)(x+3)
= 6 x^2 + 14 x -12 -[ 3x^2 +5 x -12 ]
= 3 x^2 + 9 x
110.4375
Length of pool is 3x-4
Width of deck is 3x-2
Length of deck is 2x+6
area= (2x+6)(3x-2) - (3x-4)(x+3)
= 6 x^2 + 14 x -12 -[ 3x^2 +5 x -12 ]
= 3 x^2 + 9 x
110.4375