Answer:
324
Step-by-step explanation:
L = 4W
P = 2L + 2W = 90
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2L + 2W = 90
2(4W) + 2W = 90
8W + 2W = 90
10W = 90
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W = 9
L = 36
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A = 324
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Area = 304 cm^2
perimeter = 70
perimeter = 2(l+w)
70 = 2(l+w)
70/2 = l+w
35 = l+w
Now suppose the length would be = x
width would be= 35-x
NOW Area = l*w
304 = x * (35-x)
304 = 35x -x^2
x^2-35x+304 = 0
use quadratic formula to solve next ok
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Answer:
BC= 23.0km (nearest tenth)
Step-by-step explanation:
Please see the attached picture for full solution.
Vertical line has no slope. so only look at the x value. x=-4.