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tia_tia [17]
3 years ago
11

Help with question 1 plssssss

Mathematics
1 answer:
rodikova [14]3 years ago
5 0

its answer comes in point

Step-by-step explanation:

3a+5a+12=90

8a=90-12

8a=78

a=78/8

a=9.75

if it is wrong than tell me plzzz

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2 years ago
Six less than twice a number is four in algebraic expression?​
zepelin [54]

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6 < 2n = 4

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8 0
3 years ago
-n+(-4)-(-4n)+6<br><br><br> solve
tigry1 [53]

Answer:

3n + 2

Step-by-step explanation:

-n+(-4)-(-4n)+6

= -n -4 +4n +6        [positive plus negative =  negative; ∴  +(-4) = -4

=4n - n +6 - 4                      negative plus negative = positive; ∴ -(-4n) = 4]

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8 0
3 years ago
Read 2 more answers
Alan solved the proportion StartFraction x over 200 EndFraction = StartFraction 8 over 25 EndFraction as shown. StartFraction x
bulgar [2K]

Answer:

Step-by-step explanation:

The proportion that Alan solved was

x/200 = 8/25

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(8)(x) = (25) (200)

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He divided both sides of the equation by 8. It became

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x = 625

The correct steps are

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Dividing both sides of the equation by 25, it becomes

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Alan's error were:

1) He got the wrong product when he multiplied 25 by 200.

2)He got the wrong quotient when he divided 5,000 by 8.

7 0
3 years ago
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Ghella [55]

Answer:

sum of interior angles of octagon is 1080 degrees

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so, x = 1080 - 936

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Step-by-step explanation: Simply add the angles and substract the sum from 1080 which is the sum of interior angles of octagon

8 0
3 years ago
Read 2 more answers
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