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Nikolay [14]
2 years ago
15

Let f(x) = cos(x). Use Addition or Subtraction Formulas to show the following.

Mathematics
1 answer:
uysha [10]2 years ago
7 0

Answer:

First blank is cos(h)cos(x)

Second blank is sin(x)

Step-by-step explanation:

Look up the identity and apply it here

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The awnser is m equals 15 over four I hope this helps u if so could you mark me the brainliest awnser
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3 years ago
Subtract 5y ^2−6y−115, y, squared, minus,
Tamiku [17]

Answer:

y^2+8y+16

Step-by-step explanation:

6y^2 +2y +5 - ( 5y^2 -6y-11)

Distribute the minus sign

6y^2 +2y +5 -  5y^2 +6y+11

Combine like terms

y^2+8y+16

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3 years ago
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I don't understand this question can someone help me break it down?
Lelechka [254]

Answer:

y = 52

x = 30

Step-by-step explanation:

Hi!

Y is a vertical angle. See <DOB? That's it's vertical pair. So, y = 2x - 8 [vertical angles are congruent].

Now, to find y, we need x. We can find x by using the fact that AB is a straight line. The angles on a straight line add up to 90.

Given the fact that <AOB is 90 degrees, <EOB also has to be 90 degrees.

So, EOB = 90 degrees. Remember that an angle is equal to the sum of the measures of the angles that it is made of.

EOB is therefore equal to <EOD + <DOB.

90 = <EOD + DOB

90 = (x +8) + (2x-8)

90 = 3x

x = 30

Check:

38 + 52 = 90.

So, x = 30

Now, we go back to find y.

y = 2x-8

y = 52

3 0
3 years ago
Each week in the library Mrs. Hoskins features popular books in the display. This week includes 3 mystery books, 4 biographies,
Feliz [49]
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4 bib / all 15
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3 years ago
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Mariah will deposit $1,530 in an account that earns 6% simple interest every year. Her
Vera_Pavlovna [14]

Answer:

After 3 years Mariah will have $1,805.40 while her sister Isabel will have $1,889.56.

Step-by-step explanation:

Since Mariah will deposit $ 1,530 in an account that earns 6% simple interest every year, while her sister Isabel will deposit $ 1,500 in an account that earns 8% interest compounded annually, and the deposits will be made on the same day, and no additional money will be deposited or withdrawn from the accounts, to determine the balances of Mariah's account and Isabel account at the end of the 3 years the following calculations must be performed:

Mariah:

1,530 + ((1,530 x 0.06) x 3) = X

1,530 + (91.8 x 3) = X

1,530 + 275.4 = X

1,805.4 = X

Isabel:

1,500 x (1 + 0.08 / 1) ^ 3x1 = X

1,500 x 1.08 ^ 3 = X

1,500 x 1,259712 = X

1,889.568 = X

Therefore, after 3 years Mariah will have $ 1,805.40 while her sister Isabel will have $ 1,889.56.

3 0
3 years ago
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