DavidYSD46481
04.07.2019 •
Mathematics
Given that f(x) = x 2 + 2, evaluate f(1) + f(5) which is the answer? 38 30 15
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Ответ:
your answer is 30
1^2 (raised to the power of 2) +2 is 3
5^2 +2 is 27
5^2=25
1^2=1
add 27+3=30
Ответ:
So each "square" on grid has area of 1 square unit, so we just need to count blue square unit.
It's easy to count blue unit square on section C. That would be 10 square units.
Now section B is triangle so we can find area of triangle. We need base and height and lucky, it is right angle triangle so we just need to count unit length of base and height.
base is 4 unit long and height is 4 units high, so the area of B would be (1/2) ·4·4 = 8 square units
Now for section A, it's rectangle. We can just count length and width.
It has length 12 units and width 5 units, so the area of A would be 12·5 = 60 square units.
So the area of this polygon would be A + B + C = 60 + 8 + 10 = 78
Final 78 square units
Hope this helps.