1 year ago

What is the place value?

1 answer:

7 0

D

Tens because tenths are the first number to the right of the decimal point and ones are the first number to the left of the decimal point.

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Find the exact value of cos 157.5°.

Nonamiya [84]

Cos 157.5º=-cos (180º-157.5º)=-cos 22.5=-cos(45/2)

cos Ф/2=⁺₋√((1+cosФ)/2).

In this case 157.5º is in the second quadrant, therefore we use the following equation:
cos Ф/2=-√((1+cosФ)/2). (we will have a negative number)

cos 157.5º=-cos (45/2)=-√((1+cos 45º)/2)
=-√((1+√2/2)/2)
=-√((2+√2)/4)
=-√(2+√2) / 2 (≈-0.92387...)

Answer: cos 157.5º= -√(2+√2) / 2

3 0

3 years ago

FREE BRAINLIEST!! ill also answer questions that you have posted if you answer correctly!!!! (32pts)

OlgaM077 [116]

Answer:

there is enough info to determine the figure... also the answer is D Hope this helps

Step-by-step explanation:

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2 years ago

What value of x makes the equation 3(x – 6) – 8x = –2 + 5(2x + 1) true? Explain your answer

GaryK [48]

Answer:

x = -7/5

Step-by-step explanation:

3( x - 6 ) - 8x = -2 + 5(2x + 1)

3x - 18 - 8x = -2 + 10x + 5

-5x - 18 = 3 + 10x

-5x - 10x = 3 + 18

-15x = 21

x = $-\frac{7}{5}$

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1 year ago

Write the nth term of each sequence suggested by the pattern 3. 6. 9. 12. 15...

timofeeve [1]

Answer:

3x.....

Step-by-step explanation:

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2 years ago

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PLZ HELP!!! Estimate the diameter of a circle with a circumference of 86 cm.

Pepsi [2]

Pi=3.14, So 86 x 3.14= [ 270.04]

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2 years ago