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Tema [17]
3 years ago
6

(3/5x + 4) + (1/5x -1)

Mathematics
1 answer:
kiruha [24]3 years ago
3 0

Answer:

4/5x+3

Step-by-step explanation:

remove the useless parenthesis, then calculate the x sum then the normal numbers sum

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Please help. Marika is training for a race.
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Let's call n the number of days Marika's been training for the race, and a_n the distance she runs on the nth day in meters. After the first day, when n = 1, she runs 100 meters, so


a_1=100


On the second day, she runs an additional 4 meters, on the third day, another 4, and so on. Here's what that looks like mathematically:


a_2=100 + 4\\a_3=100 + 4 + 4\\a_4=100+4+4+4


It would be easier to write this continued addition as multiplication, in which case those same equations would look like


a_2 = 100 + 4(1)\\a_3 = 100 + 4(2)\\a_4=100+4(3)


Notice that, in every case, the number 4 is being multiplied by is 1 less than n. We could even write for our first term that a_1=100+4(0). In general, we can say that


a_n=100+4(n-1)


Which is expressed by option B.


(Bonus: What piece of information from this question did we not need to use here?)

3 0
3 years ago
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sattari [20]
I’m sure your answer it’s the second one 48:70:24.3 cm
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3 years ago
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Mashutka [201]

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Step-by-step explanation:

trust me

3 0
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solmaris [256]

Answer:

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Step-by-step explanation:

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Hope this helps :)

7 0
2 years ago
Read 2 more answers
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