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AM28
23.09.2019 •
Mathematics
Johnathan class has 30 boys of the students in his class 60% are girls how many girls are in johnathans class
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Ответ:
45 girls
Step-by-step explanation:
If 60% of the class is girls then 40% of the class is boys.
30 boys are in the class, meaning that 40% of the class comprises those 30 boys
First, we need the total number of class members: 30/x = 40/100 -> 40x=3000 -> x=3000/40 -> x=75
Now that we know the total class members, at 75, we can calculate the number of girls in the class. You can do this:
0.6*75=45
or
60/100=x/75 and solve for x
Ответ:
2
Step-by-step explanation:
AB= 8, DE=4
8/4= 2
BC= 4, EF=2
4/2= 2
AC=
, DF= ![\sqrt{52}](/tpl/images/2321/4136/def18.png)