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chubhunter [2.5K]
3 years ago
5

Verify the identity. cos 4x + cos 2x = 2 - 2 sin^2(2x) - 2 sin^2 x

Mathematics
1 answer:
Advocard [28]3 years ago
8 0
So are you trying to simplify one side to get it to look like the other?
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19,340 in scientific notation
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To find the scientific notation of a number, place a decimal point after the first digit. Count how many places you moved the decimal point and that will be the power of 10.

19,340 = 1.9340×10^4
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Suppose someone gives you 15 to 4 odds that you can't roll 2 even numbers with the roll of 2 fair dice. This means you win $15 i
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4 years ago
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*URGENT*TEST TOMORROW*
Luden [163]

Answer:

"Dominic lived in Spain for 13 months and Columbia for 7 months."

Step-by-step explanation:

let months stayed in spain be "s" and months stayed in columbia be "c"

We can write 2 equations.

Since, lived in Spain and Columbia for a total of 20 months, we can write:

s + c = 20

Also, since 120 words per month in Spain and 150 words per month in Columbia for a total of 2610 new words, we can write:

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s = 20 - c

Putting in 2nd and solving:

120(20 - c) + 150c = 2610

2400 - 120c + 150c = 2610

30c = 210

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Now,

s = 20 - c = 20 - 7 = 13

So

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If Christopher consumed 600 calories by drinking x number of sodas, which expression represents the number of calories in each s
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