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Len [333]
3 years ago
6

PLEASE HELP ME WITH IT.

Mathematics
1 answer:
scoundrel [369]3 years ago
7 0

OK.  I did it.  Now let's see if I can go through it without
getting too complicated.

I think the key to the whole thing is this fact:

     A radius drawn perpendicular to a chord bisects the chord.

That tells us several things:

-- OM bisects AB. 
   'M' is the midpoint of AB.
   AM is half of AB.

-- ON bisects AC.
    'N' is the midpoint of AC.
   AN is half of AC.

--  Since AC is half of AB,
     AN is half of AM.
     a = b/2 

Now look at the right triangle inside the rectangle.
'r' is the hypotenuse, so

                                            a² + b² = r²

But  a = b/2, so             (b/2)² + b² = r²

(b/2)² = b²/4                   b²/4   + b² = r²

Multiply each side by 4:     b² + 4b² = 4r²
                                       -  -  -  -  -  -  -  -  -  -  -
                                            0  + 5b² = 4r²  
Repeat the
original equation:                a² +  b² =  r²

Subtract the last
two equations:                  -a² + 4b² = 3r² 

Add  a²  to each side:              4b²  =  a² + 3r² .    <=== ! ! !
 
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The length of the side sqaure A is 50% OF THE LENGTH OF THE SIDE SQUARE b
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Let's say the side length of square A is x, which means the side length of square B is 2x.

Then, the area of square A can be written as , and the area of square B can be written as .

There's no diagram here with shaded region, so I'll just find the area of square A as a percentage of the area of square B:

= 1/4 = 25%

So, the answer is 25% (note this is the answer to the question: "express the area of square A as a percentage of the area of square B; there is no diagram showing me where the shaded area is, so I cannot answer the original question

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Concentric as they have same center
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I’m once again asking for your Mathematical support!
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Answer:

Step-by-step explanation:

let x= hamburger

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Jalen:       5x+3y=28.50

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A mysterious card-playing squirrel offers you the opportunity to join in his game. The rules are: To play you must pay him $2. I
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3 years ago
Can someone answer questions 8-14 asap and show their work on a piece of paper thanks
Stells [14]
8. So here, you know the angle of elevation and the adjacent, and you're looking for the opposite. So first, put the angle into a tan calculator, because tan is the opposite/adjacent.

What you get is 8.64 ish.

So now, since you know the adjacent, just multiply the two together. 

8.64 * 20 = 172.8, or about 173.

9. a.  You can use the pythagorean's theorem to find this, or a ^ 2 + b ^ 2 = c ^ 2.

Basically, as long as you know the two legs' lengths in a right triangle, or a and b, you can find the hypotenuse, or c.

The two legs' lengths are 35 and 58.

So 35 ^ 2 + 58 ^ 2 = c ^ 2

1225 + 3364 = c ^ 2

4589 = c ^ 2

Then, you can square root both sides

\sqrt{4589} = c

About 68 = c

68 km

b. To do this, just divide the two together, to find the ratio of opposite / hypotenuse (sin), or 58 / 68, which equals about 0.85

Put that in the sin ^ -1 in a calculator to get about 58.211, or 58 degrees.

10. I'm sure there's a more efficient way to do this that I don't know about but I'm stupid. 

a. Whelp, me not knowing how to find the angle of indication/elevation leads to me just using tan because why not. 3.83 is about the answer, or 4.

b. Just multiply 15 by 15, to get 225 m.

11. umm, is there a b to this question?

a: sorry I don't know how to do this one :(

12. a. pythagorean's theorem, a ^ 2 + b ^ 2 = 5.6 ^ 2

Or a ^ 2 + b ^ 2 = 31.36

Since a = b,

a ^ 2 + a ^ 2 = 31.36

2a^{2} = 31.36

/2                             /2

a ^ 2 = 15.68

a = \sqrt{15.68}

about 3.96 = a

3.96 + 3.96 + 5.6 = 13.52

b. Use sin here. 28 degrees in one of those sin calculators is 0.47.

That means the opposite / hypotenuse = 0.47.

So just multiply 0.47 by the hypotenuse, or 10.7, to get about 5.

So the short side of the rectangle is 5.

So you can either do the same with cosine or use the pythagorean's theorem. Either way, you should get about 9.4.

So the perimeter is 5 + 5 + 9.4 + 9.4 = 28.8 (ish)

13. To find the outside length of one of the four triangles or the hypotenuse, since you know the opposite, use sine. Sine is opposite / hypotenuse. 50 degrees in a sin thing is about 0.77. So that means 1.4 / hypotenuse = 0.77, or 1.4 / 0.77, which equals about 1.82.

So the length of the hypotenuse is about 1.82. That times 4 is 7.28, or about 7.3.

14. I'm sorry I don't know how to do this one, I can try tho :(
6 0
3 years ago
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