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3 years ago

Hi i need help with this !

Mathematics

1 answer:

Snezhnost [94]3 years ago

7 0

Answer:

4y+8x

Step-by-step explanation:

well, because that was the only one that did not have a line on desmos.

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Review the proof step statement 1 cos(2x) = 1-sin^2(x)

ehidna [41]

Answer:

Option (3)

Step-by-step explanation:

Correct steps for the proof are,

Step Statement

1 cos(2x) = 1 - 2sin²(x)

2 Let 2x = θ

3 x = $\frac{\theta}{2}$

4 $\text{cos}\theta = 1 - 2\text{sin}^2(\frac{\theta}{2} )$

5 $\text{cos}\theta-1 =-2\text{sin}^2(\frac{\theta}{2} )$

6 $1-\text{cos}\theta =2\text{sin}^2(\frac{\theta}{2} )$

7 $\frac{1-\text{cos}\theta}{2} =\text{sin}^2(\frac{\theta}{2} )$

8 $\pm \sqrt{\frac{1-\text{cos}\theta}{2} }=\text{sin}(\frac{\theta}{2} )$

There is a mistake in step 6.

Therefore, Option (3) will be the answer.

3 0

3 years ago

Actor the expression 16x+8x+1 16x 28x +11-

Gwar [14]

<h3>Explanation:</h3>

$\large \purple {\sf { {16x}^{2} + 8x + 1}}$

$\large \pink {\sf { = {(4x)}^{2} + 2(4x)(1) + {(1)}^{2}}}$

$\large \orange {\sf { = {(4x + 1)}^{2} }}$

<h2>Answer:</h2>

$\large \green {\sf {{16x}^{2} + 8x + 1 = {(4x + 1)}^{2}}}$

6 0

3 years ago

Please help! Both questions are in the photo. Thank you so much!

tangare [24]

The probability that a 4 shows up is 0.20 and the proportion of 3's rolled is 0.467

<h3>The probability that a 4 shows up</h3>

From the list of numbers, we have:

Sides = 5 i.e. numbers 1 to 5
n(4) = 1 i.e. sides labelled 4

The probability that a 4 shows up is then calculated as:

P = n(4)/Sides

This gives

P = 1/5

Evaluate

P = 0.2

<h3>The proportion of 3's rolled</h3>

In the list of numbers, we have:

Total = 15
Number of 3's = 7

The proportion of 3's rolled is then calculated as:

P = Number of 3's/Total

This gives

P = 7/15

Evaluate

P = 0.467

Hence, the proportion of 3's rolled is 0.467