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yanalaym [24]
3 years ago
5

NEED HELP ASAP, TEST!! Solve the equation 2 cos (x) +1=0,0 ≤ x ≤ 2pi. Show all of your work.​

Mathematics
1 answer:
Viefleur [7K]3 years ago
3 0

Answer: cos(x) = -\frac{1}{2}

Work:

1. Subtract 1 from both sides

2cos(x)+1-1=0-1

2. Simplify

2cos(x)=-1

3. Divide both sides by 2

\frac{2cos(x)}{2}=\frac{-1}{2}

4. Simplify

cos(x)=-\frac{1}{2}

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Answer:

Negative means focused on what is bad or lacking. A negative ad tells you bad things about the competition. A negative person loves to complain. In math, a negative number is less than zero.

Step-by-step explanation:

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3 years ago
Round $7.345 to the nearest cent
Aliun [14]

Answer: $7.35

Step-by-step explanation:

Hi, to round a price to the nearest cent, we have to locate the hundredths place. Then look at the digit to the right. If it is 5 or above, the number in the hundredths place will be increased by 1 and all the rest of the numbers after it are eliminated. if not, the number in the hundredths place remains the same and the rest of the numbers after it are eliminated.

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Feel free to ask for more if needed or if you did not understand something.

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3 years ago
One-third of a number decreased by six equals eight. What is the number?
vaieri [72.5K]

Answer:

x = 42 is the answer

Step-by-step explanation:

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4 years ago
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What is the first step in finding the unit price on a box of 20 pencils?
olga55 [171]

You would need to know the cost of the box of 20, then you would divide the total cost by the number of pencils in the box. This would give you the cost of one pencil - which is the unit cost.


Example:

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o-na [289]

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Step-by-step explanation:

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