emma8437
02.12.2019 •
Mathematics
In a school 40% are boys and 900 are girls. find the total number of students of the school and the number of boys
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Ответ:
40% are boys
900 are girls.
To get the total number of boys, that will be number of boys, divided by hundred multiply by total number of girls
i.e 40÷100 * 900= 360, we have 360 boys, to know the number of student add 900 to the number of boys which gives you 1,260.
the total number of students in the school is 1,260
Ответ:
6x+6x+12+6x+24=-18
18x+36=-18
18x=-54
x=-3
1st integer is -3
2nd is -1
3rd is 1
6(-3+(-1)+1)=-18
6(-3)=-18
-18 = -18