
or we can round it, to say c = 2.19, so hmm that's the missing side
now, we use Heron's Formula, which uses all 3 sides only

and that'd be the area of it
Answer:
Each Eraser cost $3.50
Step-by-step explanation:



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Answer: (11, 7.5)
Step-by-step explanation:
((8, 12)+(14, 3))/2=
(8+14, 12+3)/2=
(22/2, 15/2)=(11, 7.5)
Factor the following:
2 x^3 + x^2 - 18 x - 9
Factor terms by grouping. 2 x^3 + x^2 - 18 x - 9 = (2 x^3 + x^2) + (-18 x - 9) = x^2 (2 x + 1) - 9 (2 x + 1):
x^2 (2 x + 1) - 9 (2 x + 1)
Factor 2 x + 1 from x^2 (2 x + 1) - 9 (2 x + 1):
(2 x + 1) (x^2 - 9)
x^2 - 9 = x^2 - 3^2:
(2 x + 1) (x^2 - 3^2)
Factor the difference of two squares. x^2 - 3^2 = (x - 3) (x + 3):
Answer: (x - 3) (x + 3) (2 x + 1) thus the Answer is C.
This is true.
These are perfect squares: 4, 9, 25. These are not: 7, 8, 11