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kompoz [17]
3 years ago
10

Find all solutions to the equation. cos^2x + 2 cos x + 1 = 0

Mathematics
1 answer:
garri49 [273]3 years ago
3 0

Answer:

take a picture of the problem

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Please help!!!!!! 5 points please
Alex73 [517]
\left \{ {{-x + 2y = 6} \atop {6y=x + 18}} \right.

First, we should rearrange the first equation to set it equal to y:

-x + 2y = 6
2y = 6 + x
y = 3 + 0.5x

Now, we can plug this into the second equation for y and solve for x:

6y = x + 18
6(3 + 0.5x) = x + 18
18 + 3x = x + 18
3x = x
2x = 0
x = 0

The x-value of the solution is 0.
6 0
3 years ago
How do you figure out 1/10 of 0.08
klasskru [66]
\left \{ {{y=2} \atop {x=2}} \right.  Well give me a sec
5 0
4 years ago
Read 2 more answers
Last Month, Levi had written 125 words of his book. This month,he is up to 12,580 words. About how many times more words has he
VladimirAG [237]

Answer:

He has written about 100 times as many words.

Step-by-step explanation:

In order to find this, we first need to find the number that he has written this month. In order to do so, we need to subtract the previous month from the current total.

12,580 - 125 = 12,455

Now that we have that number, we can divide it by the previous month to see how many times more words he wrote in the second month.

12,455/125 = 99.64 times more, or rounded, about 100 times more.

8 0
3 years ago
A ball is thrown into the air with an upward velocity of 28ft/s. Its height h in feet after t seconds is given by the function h
Pavlova-9 [17]

Answer:

In bold below.

Step-by-step explanation:

Find derivative which gives the velocity:

V = h' = -32t + 28

At maxm height V = 0 so

-32t + 28 = 0

Time to reach maxm height t = -28/-32 = 0.875 seconds.

So maxm height

= -16(0.875)^2 + 28*0.875 + 8

= 20.25 ft.

5 0
3 years ago
X and Y are two categorical (uncoded) variables. Can we calculate a correlation coefficient for them:
Lisa [10]

Answer:(c). No. Both variables must be quantativite

Step-by-step explanation:

Both variables must be quantitative because we can calculate Pearson correlation if they are both quantitative

3 0
3 years ago
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