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HACTEHA [7]
4 years ago
6

A number is multiplied by 3. If 3 is subtracted from the product you get 24. What is the number? 6 7 8 9

Mathematics
1 answer:
Charra [1.4K]4 years ago
7 0
For the first one, I find it easiest to work backwards. This means you do the opposite of what it says So start with 24 and add 3. This gives you 27. Then, divide by 3. This means the answer is 9.

The second one. You do (y2-y1)/(x2-X1). Plug in the numbers and you end up with -12/-3 which is equal to four.
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What is the value of x<br> 2x+3y=45 <br> x+y=10
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Assuming this is a system of equations, here is how to find x. 

2x + 3y = 45
x + y = 10 

Multiply x + y = 10 by 2 so you are able to use the elimination method.

2x + 3y = 45
2x + 2y = 20

Subtract.

y = 25

Now that we've found y, we can plug it in to find x. 

x + 25 = 10

Subtract 25 from both sides.

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<h3>Given:-</h3>
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\\  \\

<h3>To find:</h3>
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\\  \\

we know:-

\bigstar \boxed{ \rm Surface \: Area \: of \: Cylinder=2\pi rh+2\pi {r}^{2} }

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So:-

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⇢SA of cylinder = 2 × 112 × π

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⇢SA of cylinder = 224π inches ²

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