X + 2
1 answer:
Answer:
see explanation
Step-by-step explanation:
The area (A) of a trapezium is calculated as
A = h (a + b)
where a, b are the measures of the parallel sides and h the perpendicular distance between them.
here h = x - 5, a = x + 6 and b = x + 2, thus
A = (x - 5)(x + 6 + x + 2) = 36
Multiply both sides by 2 to clear the fraction
(x - 5)(2x + 8) = 72 ← expand left side
2x² - 2x - 40 = 72 ← divide through by 2
x² - x - 20 = 36 ( subtract 36 from both sides )
x² - x - 56 = 0 ← as required
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Answer:
The population alternates between increasing and decreasing
Step-by-step explanation:
<u><em>The options of the question are</em></u>
A) The population density decreases each year.
B) The population density increases each year.
C) The population density remains constant.
D) The population alternates between increasing and decreasing
we have
Find the value of
For n=2
Find the value of
For n=3
For n=4
For n=5
therefore
The population alternates between increasing and decreasing