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miss Akunina [59]
3 years ago
8

Please help I dont understand WILL GIVE BRAINLIEST

Mathematics
1 answer:
Mariulka [41]3 years ago
7 0
So for the first part
 n would need to be greater than 4 because anything equal to or lower than 4 would just put the equation to equal to or lower than 7... but you need it to be greater than

the second part is pretty simple, but still follows the same concept.

if you need 7 x (whatever) to be equal to 7
a and b would need to be the same number... and thats 1

this is because 7 x (1 over 1) would still be 7 <span />
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Answer:

10cos(5x)sin(10x) =  5[sin (15x) + sin (5x)]

Step-by-step explanation:

In this question, we are tasked with writing the product as a sum.

To do this, we shall be using the sum to product formula below;

cosαsinβ = 1/2[ sin(α + β) - sin(α - β)]

From the question, we can say α= 5x and β= 10x

Plugging these values into the equation, we have

10cos(5x)sin(10x) = (10) × 1/2[sin (5x + 10x) - sin(5x - 10x)]

= 5[sin (15x) - sin (-5x)]

We apply odd identity i.e sin(-x) = -sinx

Thus applying same to sin(-5x)

sin(-5x) = -sin(5x)

Thus;

5[sin (15x) - sin (-5x)] = 5[sin (15x) -(-sin(5x))]

= 5[sin (15x) + sin (5x)]

Hence,  10cos(5x)sin(10x) =  5[sin (15x) + sin (5x)]

8 0
3 years ago
The Jacksons went on a 700 mile trip. On the first day they drove 6 and 2/3 hours and on the second day the drove 5 and 3/4 hour
likoan [24]

Answer:

Step-by-step explanation:

Total number of miles is 700.

On the first day, they drove 6 and 2/3 hours. We would convert 6 and 2/3 hours to improper fraction. It becomes 20/3 hours. On the second day, they drove 5 and 3/4 hours. Converting to improper fraction, it becomes 23/4 hours. Total number of hours that they drove during the first two days is the sum of hours driven on the first day and hours driven on the Second day. It becomes

20/3 + 23/4 = (80 + 69)/12

= 149/12 hours

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torisob [31]
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gogolik [260]

Answer:

5.50961, or 5.5

Hope that this helps!

8 0
3 years ago
Read 2 more answers
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