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azamat
2 years ago
10

PLEASE HELP ME WITH THIS PROBLEM!!!!!!

Mathematics
1 answer:
Jet001 [13]2 years ago
5 0

Answer:

n = 59

Step-by-step explanation:

I find it easiest to work problems of this kind using a graphing calculator. That way, extraneous solutions can be avoided. It seems to work well to rewrite the problem, so you're looking for a value of n that makes the result zero. Here, that would mean you want ...

... f(n) = √(n+5) -√(n-10) -1

_____

The solution by hand involves eliminating the root symbols. You do that by squaring the equation:

... n +5 -2√((n+5)(n-10)) + n -10 = 1

Now, we isolate the remaining root and square again.

... 2n -6 = 2√((n+5)(n-10)) . . . collect terms, add 2√( ) -1

... n -3 = √(n²-5n-50) . . . . . . . divide by 2

... n² -6n +9 = n² -5n -50 . . . . square both sides

... 59 = n . . . . . . . . . . . . . . . . . add 50 +6n -n²

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Find the area of the unshaded reason for these two problems​
Taya2010 [7]

9514 1404 393

Answer:

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  b) 26,000 ft²

Step-by-step explanation:

The area of the unshaded region is the difference between the overall area of the rectangle and the area of the shaded region. It can also be found directly using the dimensions of the unshaded region.

a) We have the height of the right triangle, but need to know its base. The Pythagorean theorem can help with that. Let the base of the triangle be represented by x. Then ...

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The area of the unshaded triangle is given by the formula ...

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__

b) The shaded area at upper left is a square 100 ft on a side. Its area is ...

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The shaded area at upper right is a triangle with base and height 120 ft and 150 ft. Its area is ...

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The area of the overall rectangle is ...

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So, the unshaded area is ...

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  unshaded area = 45,000 ft² -10,000 ft² -9,000 ft² = 26,000 ft²

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