Answer:
First, you have to form simultaneous equation for both of their ages in yerms of a and b :
b = 4a - 12 -------- ( 1 )
a + b = 28 -------- ( 2 )
Next, you will have to solve it by substituting ( 1 ) into ( 2 ) :
a + (4a - 12) = 28
5a - 12 = 28
5a = 28 + 12
5a = 40
a = 8
Then, substitute a = 8 into ( 1 ) :
b = 4(8) - 12
b = 32 - 12
b = 20
Answer:

Step-by-step explanation:
<em>See Attachment for complete question</em>
For this question, we only need the data at the Congtin column.
So, we have:


First, we need to reduce Giraffe by 63%.
This gives:




Represent this as a ratio:

The closest to this ratio is 3:7.
This is shown by dividing the ratio by 15
i.e.


Approximate:

wheres the diagram ?
if you show us i can help thanks!
~bangtanboys7
Answer:
um don't understand
Step-by-step explanation:
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