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4 years ago

5-2(n+2)greater than or equal to 4+n

Mathematics

1 answer:

wolverine [178]4 years ago

7 0

Answer and step-by-step explanation:

5-2(n+2)

we learn that: a*(b-c) = a*b - a*c so in this case:

5-2(n+2)

= 5 - 2n +(-4)

= 5 - 2n - 4

= 5 - 4 -2n

= 1-2n

When you compare 1-2n and 4+n

If n is a positive number (>0), 1-2n < 4+n

For example if n =3

1-6 compare with 4+3

-5 < 7

If n is a negative number (<0), 1-2n > 4+n

For example if n = -3

1 - 2*(-3) compare with 4 + (-3)

= 7 compare with 1

If n is 0 (n=0), 1-2n < 4+n

1-0 compare with 4+0

1 < 4

Hope this help you :3

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4 years ago

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4 years ago

Explain how you could use the work backward problem-solving strategy to solve the equation x/4-6=2

Slav-nsk [51]

Hey there, Nancykkxx00!

To solve the equation
$x \div 4 - 6 = 2$
In backward problem-solving strategy, you first need to, if there are no parenthesis, either add or subtract first from both sides.
Here we have a negative 6 ( -6 ), so since we are doing it backwards, instead of subtracting 6, we are adding 6 to both sides.
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Now we move to division. Since we are diving (we always have yo do the opposite of what we are doing), we need to multiply. So,
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Always do it on both sides.
Now, we end up with
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If we plug it in, it will be like this
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So, the answer is
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Thank you for using Brainly.
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4 years ago

Please help me!! what were the errors

spayn [35]

Answer:

see explanation

Step-by-step explanation:

Given

23x + xy - y + 3y + 5 - 20x + 6xy ← collect like terms

= (23x - 20x) + (xy + 6xy) + (- y + 3y) + 5

= 3x + 7xy + 2y + 5

He combined the coefficients of the x- term incorrectly

He combined the coefficients of the y- term incorrectly

He missed out the constant term ( + 5)

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4 years ago