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Kipish [7]
2 years ago
7

If I have read a book at a rate of 20 chapters per hour. How many chapters does she read in 4 hours

Mathematics
2 answers:
vaieri [72.5K]2 years ago
8 0

20 × 4 = 80chapters

hope it helps...!!!

yarga [219]2 years ago
7 0
You could use the ratio ‘20:1’ and use box method.
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4−(3x−8)=21 solve this pls​
riadik2000 [5.3K]

Answer:

4 - ( 3x - 8 ) = 21

break the bracket first ,it gives : 4 - 3x + 8 = 21

12 - 3x = 21

- 3x = 21 - 12

- 3x = 9

-x = 9/3

-x = 3

X = - 3

[ check if the answer is correct, put -3 instead of X in the above equation ! we get 4 - { 3(-3) - 8 } = 21

4 - { - 9 - 8 } = 21

4 - { - 17 } = 21

break the bracket, minus and minus will multiply and will become plus , so we have 4 + 17 = 21 , hence 21 = 21 ! therefore X = -3

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2 years ago
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madam [21]

Answer:

The first answer is 4 and so is the next box. The last one is 10.

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3 years ago
Find the equation of the line that contains the point (-4,-1) and is perpendicular to the line 4x+5y=15. Write the line in​ slop
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