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Mathematics

1 answer:

mars1129 [50]3 years ago

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$\sf \longmapsto\dfrac{ {x}^{2} - 9 }{ {x}^{2} - 3x}$

$\sf \longmapsto \dfrac{x + 3(x - 3)}{x(x - 3)}$

$\sf \longmapsto \: \dfrac{x + 3}{x}$

$\boxed{\sf \dfrac{x + 3}{x} }$

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Please help me anyone one, C

MissTica

<h3>Answer: choice B) 120</h3>

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Explanation:

1 yard = 3 ft, 1 ft = 12 inches

Based on those two facts, 1 yard = 36 inches (since 3*12 = 36).

So 25 yards = 900 inches after you multiply both sides by 25.

Divide this over 22 to get 900/22 = 40.909090909091 which rounds down to 40 (see note below). One ribbon gets us 40 pieces, so 3 of them will get 3*40 = 120 which is the answer

note: Why do we round down and not up even though we're really close to 41? Because Erika doesn't have 41 full pieces. Instead, she has 40 whole pieces plus a fraction that is close to 1, but it's not completely there. So we just ignore that fractional part.

Side note: this is assuming that she does not waste any of the fabric. Also keep in mind that the scissors has its own width (however small), so this will likely add a bit of waste. Each scissor slice produces a thin bit of fabric that can't be used. To make things simple, its ideal to ignore this fact.

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3 years ago

Read 2 more answers

For which of the following conditions will the sum of integers m and n always be an odd integer?

lisov135 [29]

Answer:

option K cuz

Step-by-step explanation:

if we take m=7 and n=2

7 + 2= 9

and 9 is an odd number

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