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Murrr4er [49]
3 years ago
12

Anyone know the answer??

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
3 0

Answer:

B

Step-by-step explanation:

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Solve the proportion for x
S_A_V [24]

Answer:

8

Step-by-step explanation:

45 divided by 5 is 9 and what you do on the to you do on the bottom which means you would do 40 divided by 5 which you would get 8 as your answer.

7 0
3 years ago
(1+cos2x)/(1-cos2x) = cot^2x
sesenic [268]

We will turn the left side into the right side.

\dfrac{1 + \cos 2x}{1 - \cos2x} = \cot^2 x

Use the identity:

\cos 2x = \cos^2 x - \sin^2 x

\dfrac{1 + \cos^2 x - \sin^2 x}{1 - ( \cos^2 x - \sin^2 x)} = \cot^2 x

\dfrac{1 - \sin^2 x + \cos^2 x }{1 - \cos^2 x + \sin^2 x} = \cot^2 x

Now use the identity

\sin^2 x + \cos^2 x = 1 solved for sin^2 x and for cos^2 x.

\dfrac{\cos^2 x + \cos^2 x }{\sin^2 x + \sin^2 x} = \cot^2 x

\dfrac{2\cos^2 x}{2\sin^2 x} = \cot^2 x

\dfrac{\cos^2 x}{\sin^2 x} = \cot^2 x

\cot^2 x = \cot^2 x


8 0
3 years ago
Mrs. Olga’s credit card charges an interest rate of 19% compounded annually. If her current balance is $250, what will her balan
SOVA2 [1]

Answer:

$421.30

Yearly Componded Interest

$250 * 19% = $47.50 = $297.50 <-- Year One Balance

$297.50 * 19% = $56.53 = $354.03 <-- Year Two Balance  

$354.03 * 19% = $67.27 = $421.30 <-- Year Three Balance  

5 0
3 years ago
Read 2 more answers
One number is 3 more than another number. if you add 12 to 4 times the first number, the result is 5 times the second number. Fi
aleksklad [387]

Answer:

first is -3, second number is 0

Step-by-step explanation:

you have two equations x+3=y and 4*x+12=5*y

Use the first one and write y in terms of x in the second equation:

4*x+12=5*(x+3)

4*x+12=5*x+15

12=5*x-4*x+15

12=x+15

x=-3

3 0
3 years ago
3(x - 4) = -3. Solve for x.
marshall27 [118]

Answer:

x = 3

Step-by-step explanation:

3(x - 4) = -3

Divide by 3

3/3(x - 4) = -3/3

x-4 = -1

Add 4 to each side

x-4+4 = -1+4

x = 3

6 0
3 years ago
Read 2 more answers
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