I have a maybe simpler method:
Add the amount of people with cool parents(27) and subtract the number of people with both(9) to get 18 people with cool parents and 12 people have no cool parents
I got the tank is 1900 tons since when its 75% full its 3700 and when its 25% full it weighs 2500 so 3700-2500 is 50% of fuel which is 1200 tons. So 25% would be 600 tons. 2500-600=
1900 tons.
😅😅😅😅
7 and -3
24 girls= 30% of girls
8 girls= 10% of girls
80 girls=100% of girls
80 people: 40 % of class
20 people: 10% of class
200 people: 100% of class
200 people in the class, 80 girls, so 120 boys.
Here is how I solve it:
Say all the tix were bought in advance: that would mean 1200 dollars were sold. For each ticket we turn into bought at the door, we gain 5 dollars. The difference of 1390 and 1200 is 190. So 190/5 38 were bought at the door. So 82 were bought in advance.
Check
38*15=570
82*10=820
820+570=1390
If you start the sequence, you will see that each term is 10% greater than the term before.
So 10 years later would be 500,000*\(1.1^{10}\) which is $1296871.23 or just $1,296,871
5
use calc
jetpunk.com
like sporcle
a 44%+24%=68%
b 68%+13%=81%
c 100%-81%=19%
(5,2)
