jbarber
1. If x+3/3=y+2/2, then x/3 = ____.
A. y+1
B. y/3
C. y/2
D. y-1
2.A model is made of a car. The car is 10 feet long and the model is 7 inches long. What is the ratio of the length of the car to the length of the model?
A. 10 : 7
B. 7 : 120
C. 120 : 7
D. 7 : 10
3. 4/9=m/54
A. 24
B. 1/24
C. 6
D. 2/3
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RyanL.
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x+3/3=y+2/2
the left side needs to look like x/3
First we want to isolate x on the left side. What should we do?
jbarber
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i dont understand
RyanL.
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Do you know how to multiply?
jbarber
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yes
RyanL.
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Multiply both sides by 3
jbarber
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9
RyanL.
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lol you don't know how to multiply?
RyanL.
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Well let's do an easier one first # 3
4/9=m/54
\[\frac{4}{9}=\frac{m}{54}\]
RyanL.
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Multiply both sides by 54 in order to isolate m on the right side. Can you tell me what you get for m?
jbarber
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so 54 *4 and 9
RyanL.
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yes \[\frac{54*4}{9}=m\]
can you simplify that?
jbarber
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486/9=m
jbarber
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54=m
RyanL.
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How did you get 486?
jbarber
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54*4
RyanL.
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No that doesn't sound right. Do it again.
jbarber
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216