8x + 4y = 20
4y = 20 - 8x
y = 5 - 2x
Https://us-static.z-dn.net/files/d8d/e008ced388704d59896d3bf37158f465.jpeg
24 cause 25% is basically 1/4 so its 4 times 6 so its 24
Given:
Total students = 60
Student passed = 85%
To find:
The number of students who failed and then convert it in %.
Solution:
We have,
Number of passed student = 85% of Total students
= 
= 
So, number of passes students is 51.
Number of students who failed = Total students - Passes students
= 
= 
So, number of students who failed is 9.



Therefore, 15% students fail in the test.
The answer is 0.73 because in 0.975 the value of digit 7 is 7/100 ,10 times of 7/100 is 7/10 and the value of 7 in 0.73 is 7/10 ;.tenth value.