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Paul [167]
3 years ago
5

Which number line represents the solution to 2.5 - 1.2x < 6.5 - 3.2.x?

Mathematics
1 answer:
luda_lava [24]3 years ago
4 0
Bi FSU giving coco Dodo el em DVD am Lacy’s us eh cccc
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Translate the phrase to an algebraic expression “half of a number”
telo118 [61]

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1/2x or x/2

Step-by-step explanation:

You're taking the number you started with and either multiplying it by 1/2 half or dividing it by 2.

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3 years ago
There were some people on a train. 19 people got off the train at the first stop. 17 people get on the train. Now there is 63 pe
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Answer:

65 people.

Step-by-step explanation:

We have to work backwards.

We end with 63 people, and at the stop we lost 19 people and gained 17.

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Dave is three times as old as his sister. In seven years the sum of their ages will be 38. How old are they now?
bija089 [108]

Answer:

Dave is 18 and his sister is 6.

Step-by-step explanation:

If you do 38 -7x2 you can work out the combined ages of them now which is 24 (you have to do 7x2 because there are two of them and its seven years in the future). Then you can work out their ages using a ratio. Dave’s age : his sister’s age is 3:1 so if you divide 24 by 4 (3+1 = 4 so your can work out one portion of their age) you can find out how old the sister is which is 6. Times that by 3 to get Dave’s age which is 18. A formula for this (where x is his sisters age) would be 3x=38-7x2 which cancels down to 6.

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3 years ago
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