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rewona [7]
3 years ago
11

Clare's school took a field trip. A total of 21 vehicles were needed. Some students went in busses and some went in cars. Each b

us held 30 students and each car held 4 students. A total of 318 students went on the trip. How many busses and how many cars were used?
Mathematics
1 answer:
Nikitich [7]3 years ago
6 0
I’m working on it right now, so give me some time please
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Vesna [10]

Answer:

1.  2\frac{5}{8}  

Step-by-step explanation:

We can see that CD is angle bisector, So we will use angle bisector theorem which states that the angle bisector of an angle of a triangle divides the opposite side in two segments that are proportional to the other two sides of the triangle.

We can set up an equation as:  

\frac{AC}{AD}=\frac{BC}{BD}

Upon substituting our given values we will get,

\frac{3}{AD}=\frac{5}{(7-AD)}}

Cross multiplying our equation we will get,

5AD=3*(7-AD)

5AD=21-3AD

5AD+3AD=21

8AD=21

AD=\frac{21}{8}

AD=2\frac{5}{8}

Therefore, the length of AD is 2\frac{5}{8} units and 1st option is the correct choice.

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Sindrei [870]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

Let the total amount of salary be X, then

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by cross multiplying

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