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Viktor [21]
3 years ago
15

Which expression is represented by the model below?

Mathematics
1 answer:
jarptica [38.1K]3 years ago
5 0

Answer:

G. 4 x (-5)

Step-by-step explanation:

This gets you to -20 and you are subtracting 5 4 times. So this makes the most sense to me.

Hope it helps!

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Which fraction is equal to 2/8?
valina [46]
D is the correct answer
You can convert 2/8 into 1/4 but finding the common factor which is 2 because 2 goes into both 2 and 8 in the fraction
Divide 2 with both 2 and 8
2 divides by 2 = 1
8 divides by 2= 4
1/4 is equal to 2/8
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Step-by-step explanation:

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What is the discount price os a skateboard that cost $155.80 on sale for 20% off
pshichka [43]
Here's an example of %
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What is the cost of 15 tomatoes 6 for $4
r-ruslan [8.4K]

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Step-by-step explanation:

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4 years ago
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Find the general solution of <img src="https://tex.z-dn.net/?f=2cos%282x%20%2B%20%5Cfrac%7B%5Cpi%20%7D%7B4%7D%20%29%20%3D%20%5Cs
Aleks04 [339]

Answer:

\large\boxed{x=-\dfrac{\pi}{4}+k\pi\ \text{or}\ x=k\pi\ \text{for}\ k\in\mathbb{Z}}

Step-by-step explanation:

2\cos\left(2x+\dfrac{\pi}{4}\right)=\sqrt2\qquad\text{divide both sides by 2}\\\\\cos\left(2x+\dfrac{\pi}{4}\right)=\dfrac{\sqrt2}{2}\to2x+\dfrac{\pi}{4}=\pm\dfrac{\pi}{4}+2k\pi\\\\2x+\dfrac{\pi}{4}=-\dfrac{\pi}{4}+2k\pi\ \vee\ 2x+\dfrac{\pi}{4}=\dfrac{\pi}{4}+2k\pi\qquad\text{subtract}\ \dfrac{\pi}{4}\ \text{from all sides}\\\\2x=-\dfrac{2\pi}{4}+2k\pi\ \vee\ 2x=2k\pi\qquad\text{divide all sides by 2}\\\\x=-\dfrac{\pi}{4}+k\pi\ \vee\ x=k\pi\ \text{for}\ k\in\mathbb{Z}

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4 years ago
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