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AleksAgata [21]
3 years ago
14

I need to know this help now please and thank you !

Mathematics
1 answer:
Makovka662 [10]3 years ago
8 0
The third one!!!!!!!!
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Which equation represents a direct variation
Mazyrski [523]

Direct variation is is when the x and y a direct relation

without constants added or subtracted

With being times by each other

so the only one that meets the definite is the first one

 y = 0.5x  means y is equal to half of x.  So you know that every y is directly related to half of x

7 0
4 years ago
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Jonathan’s parents told him that for every 5 hours of homework or reading he completes, he will be able to play 3 hours of video
Studentka2010 [4]
So, to set up this equation, lets just say that Lucas did 5 hours of homework also. The ratio of Lucas's homework to video games is 60 minutes of homework/30 minutes of video games. If we converted the 5 hours into 300 minutes then you would multiply the 60 minutes by 5 and the 30 minutes by 5 also. You would get 300 minutes/150 minutes. Jonathan's  ratio is every 5 hours of homework/3 hours of video games. We would convert this to minutes by taking both numbers and multiplying them by 60. We would get 300 minutes/180 minutes. Using this we know that Jonathan gets more time to play video games because every 5 hours of homework he gets 180 minutes of gaming and for Lucas, every 5 hours of homework he only gets 150 minutes of gaming. I hope that this helped you!
6 0
4 years ago
In the figure to the right, OC=10, m
kotykmax [81]

Answer:

Let AB be the flagstaff and CD be the vertical tower.

AB=10m=EC

BC=20m=AE

In triangle ABC we have,

tanx=AB/BC

tanx=10/20

1/tanx=20/10

10/tanx=20...........1

In triangle ADE we have

tan(90-x)=DE/AE

cotx=DE/20

1/cotx=20/DE

DE/cotx=20..............2

by eq1 and. eq 2 we get

10/tanx=DE/cotx

10/(AB/BC)=DE/(BC/AB)

10/(10/20)=DE/(20/10)

10×20/10=DE×10/20

DE=40m

Therefore height of vertical tower = DE+EC=40+10=50m

8 0
4 years ago
PLEASE HELP! WILL MARK BRAINLIEST
-BARSIC- [3]
The answer is the last option
3 0
4 years ago
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How do you work ratio tables in 7th grade
ELEN [110]
Ratio tables are like proportional relationships (if you know what that is), and you have to do this:
6:9 is related to a:45 we don't know a, but since the prior ratio is related to this one, you simply take 9 times what is 45. The answer is 5, so then you multiply 6 times 5 to get 30. Then keep building off of that. The next problem will be 48, then 72.
The bottom ratios start with 10:15. 15 times 3 is 45 so 10 times 3 is 30. The next one is 100, then 70. Hope this helps, sorry that it's confusing!

8 0
4 years ago
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