I forgot how to do ratios can some one tell me how to do them again
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Mehek (mehek14):
you want me to give an example?
OpenStudy (i_ask_alot):
yes please!:P
OpenStudy (alivejeremy):
i wanna learn too :D
Mehek (mehek14):
so let's we have this problem:
You have 4 red marbles and 7 blue marbles
Find the ratio of red marbles to blue marbles
You can write that in 3 ways:
1) 4 to 7
2) 4:7
3) \(\dfrac{4}{7}\)
OpenStudy (alivejeremy):
so let's we have this problem?
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OpenStudy (alivejeremy):
What's the three ways mehek :D
OpenStudy (i_ask_alot):
The ratio of boys to girls in the Science Club is 3:5. If there are 60 girls, how many boys are there?
A) 23
B) 36
C) 38
D) 45
OpenStudy (alivejeremy):
Oh Nvm i see
Mehek (mehek14):
set up proportions
\(\dfrac{3}{5}=\dfrac{x}{60}\)
Mehek (mehek14):
now you can cross multiply
3*60 = ?
5 * x = ?
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OpenStudy (i_ask_alot):
36????
Mehek (mehek14):
correct :)
OpenStudy (i_ask_alot):
THANKS!!!:):)
Mehek (mehek14):
yw :)
OpenStudy (alivejeremy):
Mehek how did yall get 36
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OpenStudy (anonymous):
flutter
Mehek (mehek14):
cross multiplication
OpenStudy (alivejeremy):
Oh
OpenStudy (alivejeremy):
:D
Mehek (mehek14):
or ypu can look at it like this
5 times what gives 60? 12
so 3 * 12 = 36
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Mehek (mehek14):
you*
OpenStudy (anonymous):
lol I just got warned by moderator XD
OpenStudy (alivejeremy):
Oh i get it mehek
OpenStudy (anonymous):
flutter wingspan flutter
OpenStudy (alivejeremy):
Mehek your my new teacher now airjordan is firer
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Mehek (mehek14):
haha oke ;P
OpenStudy (i_ask_alot):
A piece of wire 6 cm long weighs 30 grams. What is the weight of an 8 m length of the same wire?
A) 400 grams
B) 425 grams
C) 640 grams
D) 4000 grams
Mehek (mehek14):
first we convert cm -> m
OpenStudy (anonymous):
flutter
OpenStudy (alivejeremy):
^^^^
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OpenStudy (i_ask_alot):
how do u do that?
OpenStudy (alivejeremy):
lol
Mehek (mehek14):
1 cm = 0.01 m
Mehek (mehek14):
so 6 cm = 0.06 m
Mehek (mehek14):
\(\dfrac{0.06}{30}=\dfrac{8}{x}\)
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OpenStudy (i_ask_alot):
4000
Mehek (mehek14):
so D
OpenStudy (i_ask_alot):
If a bag contains 18 red, 6 yellow, 24 blue, and 8 white balloons, what is the part to whole ratio of white balloons?
A) 1:5
B) 1:6
C) 1:7
D) 1:8
Mehek (mehek14):
\(\dfrac{white}{total}\)
OpenStudy (i_ask_alot):
?????
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Mehek (mehek14):
how many white?
how many balloons in total?
OpenStudy (i_ask_alot):
8
Mehek (mehek14):
Total?
OpenStudy (i_ask_alot):
56
Mehek (mehek14):
8/56
simplify
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