Answer:
I will comment the answer
Step-by-step explanation:
It will take a hour to answer your question
Answer:
Here You Go! I'm not really sure about this one but i tried.
Step-by-step explanation:
Answer:
520 out of 800 students ride the bus
Step-by-step explanation:
Given


Required
Determine the number of students 
To do this, we simply multiply the proportion by the total number of students.
i.e.


Express the percentage as decimal


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Answer:
x=3
Step-by-step explanation:
cross multiply
5(x+3)=3(x+7)
5x+15=3x+21
5x+15-3x=3x+21-3x
2x+15=21
2x+15-15=21-15
2x=6
x=3
Answer:
If you study your lesson, you will get a good grade.