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elena55 [62]
2 years ago
15

Anyone knows this?!? ​

Mathematics
1 answer:
Sunny_sXe [5.5K]2 years ago
8 0

Answer: the top one.

Step-by-step explanation:

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i am a number beetween 20 and 30 who is divisible by 2 4 and 7. I am an even number as well who am I?
miskamm [114]

Answer:

28

Step-by-step explanation:

28/2=14

28/4=7

28/7=4

28 is an even number

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3 years ago
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Twelve Divided by the sum of a number and five
fredd [130]
12/x+5
x represents “a number” because it’s unknown and the + sign is because the words sum
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Identify the error in this column:<br> (x2 + 3x + 18) = (x + 3)(x + 6)
inessss [21]

Answer:

I think the error is that the variable x came before the whole number 2.

3 0
3 years ago
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40% of an hour in minutes and secs
olga55 [171]

Answer:

<em>40% of an hour </em><em>equals: </em><em>24 minutes </em>

<em>40% of an hour also </em><em>equals: </em><em>1440 seconds</em>

<u>Skills needed: Time Units Conversion</u>

Step-by-step explanation:

1) First, we need to understand how to convert between hours, minutes, and seconds.

There are 60 minutes in 1 hour ==> 1 hour = 60 minutes

There are 60 seconds in 1 minute ==> 1 minute = 60 seconds

- This means that there are 3600 seconds in 1 hour (60*60=3600)

- This also means that there are 60 minutes in 1 hour

2) We are trying to find how many minutes (or seconds) 40% of an hour is.

---> When converted to decimal, 40\%=\frac{40}{100}=0.4

40% of an hour = 0.4 hours

Since there are 60 minutes in an hour, there are 60*0.4 minutes in 0.4 hours. 60*0.4=24 so, 24 minutes in 0.4 hours.

Since there are 3600 seconds in an hour, there are 3600*0.4 seconds in 0.4 hours. 3600*0.4=1440 so, 1440 seconds in 0.4 hours.

3 0
2 years ago
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The effect of the time of day a science class is taught on test scores is being
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If you have answer choices that would be helpful.

If not I would assume that it means that giving every student the same test is an example of a controlled variable.

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3 years ago
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