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N76 [4]
3 years ago
10

4m (2mn-8m) +3n (5n-6mn) please help me​

Mathematics
1 answer:
Alecsey [184]3 years ago
7 0

Answer:

-32m-4mn+15n

Step-by-step explanation:

<em><u>BODMAS</u></em> means Bracket of Division Multiplication Addition Subtraction.

So any time you have lot of signs use <em><u>BODMAS</u></em>.

Thank you do you understand

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Given the diagram below find the value of x if the area is 21 aquare meters
Oksanka [162]

Answer:

The answer is <u><em>7</em></u>!

Step-by-step explanation:

(x-4) (x) = 21, x^2 - 4x = 21, x^2 - 4x - 21 = 0, (x - 7) (x + 3) = 0, x = 7 and -3; x can't be negative so the answer is 7!

x = 7 and x - 4 (other side) = 3

5 0
3 years ago
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uranmaximum [27]
20% of 60 is 12

60/300 = 20%

The friend is incorrect because that is 20% of 300 not 60
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2 years ago
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HELP PLZ!!Which equations have exactly one y-value for any given x-value? Select all that apply.
lbvjy [14]

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Step-by-step explanation:

3 0
3 years ago
Please help me, please and thank youuu! :D
katen-ka-za [31]

Answer:

f = - \frac{19}{7}

Step-by-step explanation:

Given f varies directly with m then the equation relating them is

f = km ← k is the constant of variation

To find k use the condition f = - 19 when m = 14

- 19 = 14k ( divide both sides by 14 )

- \frac{19}{14} = k

f = - \frac{19}{14} m ← equation of variation

When m = 2 , then

f = - \frac{19}{14} × 2 = - \frac{19}{7}

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2 years ago
Triangle LPQ has side lengths of 9, 20, and 15. Classify the triangle by its sides
Aneli [31]

Since all of the side lengths are different, it is a scalene triangle

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