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ad-work [718]
3 years ago
10

Right and solve an equation to find the number n.four times a difference of a number and seven is 12

Mathematics
1 answer:
amm18123 years ago
5 0

For this case we must propose an algebraic expression associated with:

"four times a difference of a number and seven is 12"

So we have to:

Four times a difference of a number and seven is represented as: 4 (n-7)

So we have the expression is:

4 (n-7) = 12

We apply distributive property to the terms within parentheses:

4n-28 = 12

We add 28 to both sides:

4n = 12 + 28\\4n = 40

We divide between 4 on both sides:

n = \frac {40} {4}\\n = 10

Answer:

n=10

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Rashid [163]
<h3>Answer:  11/13</h3>

============================================================

Explanation:

Add up the four numbers given: 4+8+4+10 = 26 items total

Kick out the 4 black shirts since they are neither blue, nor are they pants.

So we have 26-4 = 22 items that are blue or a pair of pants (or both).

Divide that over the total (26) to get the probability we're after:

22/26 = (11*2)/(13*2) = 11/13

Side note: 11/13 = 0.8462 = 84.62% approximately

7 0
2 years ago
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ki77a [65]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
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Rashid [163]

Answer:

127

Step-by-step explanation:

3 x 7 + 5 - 2 -  3 + y

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3x7 = 21

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24 - 3 = 21

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6 0
3 years ago
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crimeas [40]

Answer:

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Step-by-step explanation:

add 1 to both sides and there you have your answer!

2 ≤  q-1

+1       +1

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