Answer:
20x-8y+ 7/20
Step-by-step explanation:
Rectangle = 8x16 = 128
Triangle = (1/2)(3)(6) = 9
Area of the irregular shape = 128 + 9 137 sq ft
Ok for this problem, there are 2 equations representing hall A and hall B
hall A: y=76x+862 where x=number of dinners and y=total cost
hall B: y=75x+894 for the same variables
To find where the 2 meet, simply substitute one equation into the other, creating: 76x+862=75x+894
Solving this, we find that x=32, so at 32 guests, the cost would be the same
For part 2, put the answer for part 1 into either equation from the start, so y=76(32)+862, or y=3294
And we already found that x=32, which represents the # of guests
36 + 5 = 41
41 x 2 = 82
The answer is 82
