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Dennis_Churaev [7]
3 years ago
11

Ross had some stickers. He gave 297 of them to his sister.

Mathematics
1 answer:
Luba_88 [7]3 years ago
8 0

Answer:

Ross has 450 stickers.

Step-by-step explanation:

Ross gave stickers to his sister = 297

If 66% of stickers Ross gave to his sister, how many stickers does Ross have?

Let Ross have stickers = x

So, we can write:

66\% of x = 297

Now solving this equation and finding value of x

66\% of x = 297\\\frac{66}{100}\times x = 297\\x=297 \times \frac{100}{66}\\x=450

We get x = 450. We know x= Number of stickers Ross has

So, Ross has 450 stickers.

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2x+3y=1 and y=-2 - 9 solve using linear combination method. Please explain steps.
kaheart [24]

Answer:

x=17

Step-by-step explanation:

2x+3y=1

y=-2-9

  • In order to combine these two equations, an idea you need to keep in mind is finding a way of setting these equations as equal to each other. I saw that each equation shared a common value, y. In this case, we need to isolate y in the first equation so that both equations =y.

2x+3y=1

3y=-2x+1

\frac{3y}{3}=\frac{-2x+1}{3}

y=-\frac{2}{3}x+\frac{1}{3}

  • With this, we now know that both -2-9 and -\frac{2}{3}x+\frac{1}{3} are equal to y, so we can set them equal to each other.

y=-\frac{2}{3}x+\frac{1}{3}

y=-11

-\frac{2}{3}x+\frac{1}{3}=-11

  • Reply to this if anything I'm saying or doing is confusing in any way, or if you find a mistake. :) Solve for x.

-\frac{2}{3}x+\frac{1}{3}=-11

-\frac{2}{3}x=-11-\frac{1}{3}

-\frac{2}{3}x =-\frac{33}{3}-\frac{1}{3}

-\frac{2}{3}x =-\frac{34}{3}

-\frac{2}{3}x(-\frac{3}{2})=-\frac{34}{3}(-\frac{3}{2})

x=\frac{102}{6}=17

x=17

  • Hopefully this answer is correct AND makes sense in terms of how I achieved it. Again, reply to this with any questions or mistakes I made and I'll do my best to answer or fix them.

 

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3 years ago
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Answer: attached image

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Answer:

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Step-by-step explanation:

Hope this helps!

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Answer:

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Step-by-step explanation:

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