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Anit [1.1K]
2 years ago
15

Given cos(x)=1/2, what is the value of cos(x+pi)?

Mathematics
1 answer:
patriot [66]2 years ago
8 0

Answer:

-1/2

Step-by-step explanation:

cos(x+pi) = -cos(x), so the answer is -1/2.

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Steve, 18 years old, is three times as old as his brother Daniel. How old will Steve be when he will be twice as old as Daniel?
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3 years ago
Read 2 more answers
-5^2 + (-15) ÷ (-3) + 20 Solve using PEMDAS showing work
oee [108]
In PEMDAS, there is no parentheses in this equation, so we move on to exponents.

-5^2 is 25
Now, we divide -15/-3 then we get 5
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Your answer should be 47!
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5 0
3 years ago
What is the value of y in the equation 4(5y − 8 − 2) = 185 − 15? 8. 5 9. 7 10. 5 42. 5.
Bezzdna [24]

Answer:

10.5 is the answer

Step-by-step explanation:

4(5y−8−2)=185−15

(4)(5y)+(4)(−8)+(4)(−2)=185+−15(Distribute)

20y+−32+−8=185+−15

(20y)+(−32+−8)=(185+−15)(Combine Like Terms)

20y+−40=170

20y−40=170

20y−40+40=170+40

20y=210

20y/20=210/20

y=21/2

y=10.5

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2 years ago
I can't figure out how to do this. Please show work
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