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3 years ago

Explain how you could mentally find 8x45by using the distributive property

Mathematics

1 answer:

777dan777 [17]3 years ago

7 0

You just break it up, do 20x8 then another 20x8 then 5x8

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Use the power-reducing formulas to rewrite the expression as an equivalent expression that does not contain powers of trigonome

ratelena [41]

Answer:

$x = 0.175\cdot (1-\cos 4\cdot \theta)$

Step-by-step explanation:

Let use the following trigonometric identities:

$\sin^{2}\theta = \frac{1-\cos 2\cdot \theta}{2} \\\cos^{2}\theta = \frac{1+\cos 2\cdot \theta}{2}$

Then, the equation is simplified by substituting its components:

$x = 1.40\cdot \left(\frac{1-\cos 2\cdot \theta}{2} \right)\cdot \left(\frac{1+\cos 2\cdot \theta}{2} \right)$

$x = 0.35\cdot (1-\cos^{2}2\cdot \theta)$

$x = 0.35\cdot \sin^{2}2\cdot \theta$

$x = 0.35\cdot \left(\frac{1-\cos 4\cdot \theta}{2} \right)$

$x = 0.175\cdot (1-\cos 4\cdot \theta)$

7 0

3 years ago

Read 2 more answers

Can someone please explain this

SSSSS [86.1K]

Answer:

-1

Step-by-step explanation:

can you also hep me on something

4 0

3 years ago

1/3 X 12 = 12 X ___ = __

valkas [14]

1/3=4 hop this help you

8 0

3 years ago

I earned $100. I wish to give 15% of this to my mother. How much should I give her?

garik1379 [7]

<h2><em>All of it. Be kind to your mother.</em></h2><h2><em></em></h2><h2><em></em></h2><h2><em></em></h2><h2><em>In all seriousness, 15% of 100 is itself. 15. If it was 27%, it'd be 27. So on and so forth.</em></h2>

6 0

3 years ago

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An office supply store sells pencils individually or by the case. Pencils purchased individually cost $0.97 each. One case of fo

Rina8888 [55]

If each there are 40 pencils, then divide to find how much each pencil is.

37.20 / 40 = $0.93

Correct answer is D.

After solving, we see that buying the case of 40 pencils is cheaper than buying 40 individual pencils.

Hope This Helped! Good Luck!

5 0

3 years ago