<h3>
Answer: C = -4</h3>
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Work Shown:
C(x+2) - (x+2)(x-2) = 0
(x+2)(C-(x-2)) = 0
(x+2)(C-x+2) = 0
x+2 = 0 or C-x+2 = 0
x = -2 or x = C+2
If we want one solution only, then we must make C+2 = -2 which solves to C = -4
If C = -4, then x = C+2 = -4+2 = -2 which matches with the first solution mentioned. If C is anything else but -4, then we'd have two different solutions (eg: C = 10 leads to x = C+2 = 12 as the other solution)
<h3>I'll teach you how to solve (81x^-20 y^-16)^-3/4</h3>
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(81x^-20 y^-16)^-3/4
Apply exponents rule:
(81x^-20 y^-16)^-3/4=
1 / (81x^-20 y^-16)^-3/4
Simplify (81x^-20 y^-16)^-3/4:
1/27/x^15 y^12
Apply the fraction rule:
x^15 y^12 / 27
Your Answer Is x^15 y^12 / 27
plz mark me as brainliest if this helped :)
Answer:
248 acres
Step-by-step explanation:
A forest covers 31,000 acres
0.8% of the forest old growth trees
There are 0.8% × 31000 = 248 acres of old growth trees
8.625 is the correct answer.
