fdryktysysmzet3640
10.02.2020 •
Mathematics
Type the equations and values needed to compute the difference between the market value of the car and its maintenance and repair costs for the eighth year. Age of car = 8 years. Original cost = $15,500.
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Ответ:
There are 25 students in the class after the changes
Step-by-step explanation
Let G= The total number of girls after the change
Let B= The total number of boys after the change
g/b=3/2
G+7/B-2=5/2
After cross multiplying you get 5B-10=2B+14
and 3B=2B
Then you solve to get B=12. Then plug B back in any equation to get G=18.
Then plug your to number back in G+7/B-2=5/2 to get 18+7 and 12-2. Once you solve and add you get 25 students.