Ashlynnocean6305
30.12.2019 •
Mathematics
The ratio of boys to girls at a school is 9 to 11. if 400 students attend the school, how many are girls?
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Ответ:
220
Step-by-step explanation:
Given : The ratio of boys to girls at a school is 9 to 11.
Let the number of boys be 9x and the number of girls be 11x.
Since there are 400 students attend the school.
Then we have the following equation :-
Now, the number of girls = 11x = 11(20)=220
Hence, there are 220 girls.
Ответ:
For lines to be perpendicular they have to make 90° angles
Since x = 4 is a straight vertical line
The answer is y = 5
Hope this helps!