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aksik [14]
3 years ago
12

If p(x) = 2x2 – 4x and q(x) = x – 3, what is (p circle q) (x)?

Mathematics
1 answer:
Mandarinka [93]3 years ago
6 0
Solution:

(p o q) = p(q(x))
p(q(x)) = 2(x - 3)^2 - 4(x - 3)
======= 2(x - 3)(x - 3) - 4(x - 3)
======= 2(x^2 - 6x + 9) - 4(x -3)
(p o q) = 2x^2 - 10x + 30
(p o q) = 2[x^2 - 5x + 15]
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Rewrite the product as a sum: 10cos(5x)sin(10x)
mote1985 [20]

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
What is the missing dimension of a rectangle or prism with the following dimensions and volume? Length 3 cm width 5 cm volume 45
olasank [31]
Hello! 

In order to find out the volume of any prism, you are to do length x width x height.

Because we only know the length and the width, we can multiply those to get started. 3 x 5 is 15, so we know that's what we can start with.

Because we know the volume, all we have to do is do h x 15 = volume (45). Now, what is height?

In order to find the height, we must find a number that, when multiplied by 15, equals 45. 

So we can try out 3, which when multiplied by 15, equals 45. 

That means 3 is your height.

Hope I helped! :)
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Korvikt [17]

Answer: 23

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

View Picture

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