Hey i need some help with this prob

Mathematics

2 answers:

sp2606 [1]3 years ago

4 0

82 is the hypotenuse.

Follow the c² - b² = a² formula, in which c is the hypotenuse.

Plug in the numbers

(82)² - (80)² = (a)²

Simplify.

82 x 82 = 6724
80 x 80 = 6400

6742 - 6400 = a²

Subtract:

a² = 6724 - 6400
a² = 342

Finally, root both sides

√a² = √342
a = √342
a = 18.49

You're closest answer through rounding is (A) 18.

hope this helps

algol [13]3 years ago

3 0

The answer would be: $82^2+80^2 = 18$ , using the Pythagorean theorem, the answer would be: $\sqrt{324}$ or 18.

Hope this helped! c:

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A photo of a beetle in a science book is increased to 535% as large as the actual size. If the beetle is 14 millimeters, what

AnnZ [28]

Answer: 74.9 millimeters

Step-by-step explanation:

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3 years ago

Solve for x and y: 3/x -1/y =13/10 1/x + 2/y =9/10

harkovskaia [24]

Answer:

(x, y) = (2, 5)

Step-by-step explanation:

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x' +2y' = 9/10

Adding twice the first equation to the second, we get ...

2(3x' -y') +(x' +2y') = 2(13/10) +(9/10)

7x' = 35/10 . . . . . . simplify

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Using the first equation to find y', we have ...

y' = 3x' -13/10 = 3(5/10) -13/10 = 2/10 = 1/5

So, the solution is ...

x = 1/x' = 1/(1/2) = 2

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(x, y) = (2, 5)

_____

The attached graph shows the original equations. There are two points of intersection of the curves, one at (0, 0). Of course, both equations are undefined at that point, so each graph will have a "hole" there.