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Alexeev081 [22]
3 years ago
5

What is the cosine of angle X? A. 40/41 B. 9/40 C. 9/41 D. 41/40

Mathematics
1 answer:
lesya [120]3 years ago
5 0
You have to use Pythagorean's theorem to find the missing side measure. 41^2=40^2 + w^2.  1681 = 1600 + w^2.  1681-1600=w^2.  81=w^2 and w = 9. That's an odd triangle, but accurate! Now use the cos definition of cos x = 9/41, and cos x = .2195. Now use the inverse function on your calculator in degree mode to see that the angle x is 77.3 degrees.
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$700 is invested at 4% per annum. How long will it take for the amount to reach $784?​
Blababa [14]

Answer:

3yrs

Step-by-step explanation:

Given parameters:

Capital = $700

Percentage interest  = 4% per annum

Unknown:

Time it will take for amount to be  = $784

Solution:

To find the simple interest on an amount;

        I = \frac{PRT}{100}

P is the principal

R is the rate

T is the time

I is the interest

    Insert the parameters:

        I  = \frac{700x 4 x T}{100}

        I = 28T

So;

   At the end of the duration:

       Principal + Interest  = Amount

          700+28T = 784

                   28T = 784 - 700

                   28T = 84

                       T = 3yrs

5 0
3 years ago
Niko Bought 4 stamps each week for 3 weeks. He wants to put 6stamps on each page of his album. How many pages will niko use
MaRussiya [10]
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6 0
3 years ago
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The manager at Ben's Furniture Store is trying to figure out how much to charge for a table that just arrived. If the table was
bija089 [108]

Answer:

176.7

Step-by-step explanation:

8 0
3 years ago
Help! i can’t figure this out!
Lunna [17]
X=36 because 1/3 times 36 equals 12
8 0
3 years ago
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I don’t understand what to write
Whitepunk [10]

Answer:

No, she's incorrect. You cannot split up something in parenthesis when it is being squared. By doing so she doesn't have a middle term. The correct equation is 25x^6 + 30x^3 + 9

Step-by-step explanation:

1. Square the first term.

(5x^3)^2 = 25x^6

2. Square the second term.

3^2 = 9

3. Multply the two terms together and multiply by two.

5x^3 × 3 = 15x^3

15x^3 × 2 = 30x^3

4. Add everything together.

25x^6 + 30x^3 + 9

I hope this helps!

4 0
3 years ago
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