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larisa [96]
3 years ago
10

Tom knows that in his school 10 out of every 85 students are left-handed. There are 391 students in Toms school. How many are le

ft handed?
Mathematics
1 answer:
fiasKO [112]3 years ago
5 0
The answer would be 46 - This is because you would do 85/10 to find the ratio. Then you would get 8.5. You would take 8.5 then divide 391 by 8.5 getting 46.
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the expression u could use is

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Mashcka [7]

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Read 2 more answers
What is the simplified form of the rational expression below 6x^2-54 / 5x^2+15x
Vladimir [108]

Answer:

\large\boxed{\dfrac{6x^2-54}{5x^2+15x}=\dfrac{6(x-3)}{5x}=\dfrac{6x-18}{5x}}

Step-by-step explanation:

6x^2-54\qquad\text{distributive}\\\\=6(x^2-9)=6(x^2-3^2)\qquad\text{use}\ a^2-b^2=(a-b)(a+b)\\\\=6(x-3)(x+3)\\\\5x^2+15x\qquad\text{distributive}\\\\=5x(x+3)\\-----------------\\\\\dfrac{6x^2-54}{5x^2+15x}=\dfrac{6(x-3)(x+3)}{5x(x+3)}\qquad\text{cancel}\ (x+3)\\\\=\dfrac{6(x-3)}{5x}=\dfrac{6x-18}{5x}

6 0
3 years ago
Cineva va rog!<br><img src="https://tex.z-dn.net/?f=%28%20-%204%20%2B%209%29%20%20%5Ctimes%20%281%20-%208%29" id="TexFormula1" t
nevsk [136]

Step-by-step explanation:

( - 4 + 9) \times (1 - 8) \\  = 5 \times ( - 7) \\  =  - 35

hope it helps:)

5 0
3 years ago
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