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Juliette [100K]
3 years ago
6

There are 3 students to 1 adult on a field trip. You need to find the number of adults needed for 24 students. What would the se

cond ratio of the proportion look like if the first proportion is as follows: (s is just short for students, and a is just short for adult cause it would make the fraction look weird if I didn't use letters). 30 points!!!!!!!!!!!!!!!!!!!!!
(A) 3s/s

(B) 3/1

(C) 24s/x

(D) 1/3

(E) x/24s
Mathematics
1 answer:
coldgirl [10]3 years ago
5 0

Answer:

a = 24*1/3

a =8  

Step-by-step explanation:

We are using proportions to solve this problem by putting students over adults

students         3                   24

--------------- = ---------------  = -------------

adults                 1                   a

where a is the unknown number of adults

Using cross products

3a=24*1

Divide by 3

a = 24*1/3

a = 24/3

a = 8

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3/4= j-1/2
first to add 1/2 to both sides to solve for j 
3/4 + 1/2= j
second you find a common denominator in order to add 3/4 and 1/2, the common denominator would be 4, you would have to change 3/4 at all because the denominator is already 4 but in order to make the denominator of 1/2, 4 you would have to multiply both the denominator and numerator by 2 so 
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to check your answer you plug 5/4 in for j 
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5-2= 3 and you would keep the 4 so 
5/4 - 2/4 = 3/4

so j =  5/4
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