Let the number of chemistry books be x and the number of calculus books be y
total number of books in each case is:
x+y=24
x=24-y.....i
Weight of each case:
2707.2/20
=135.36
thus
4.2x+6.0y=135.36..ii substituting i in ii
4.2(24-y)+6y=135.36
100.8-4.2y+6y=135.36
hence
1.8y=34.56
y=19.2
hence
x=24-19.2
x=4.8
thus the number of chemistry books was 4.8*20=96 number of calculus was
19.2*20
=384 books
Answer:
line k im pretty sure and 34
Answer: b.
Step-by-step explanation: I have the answer sheet
So, from 10 minutes down to 2 minutes, the difference is 8 minutes.
if we take 10 to be the 100%, what is 8 off of it in percentage?
Answer: 950 kg
Step-by-step explanation:
Given
Hassan sells a total of
of vegetables
The ratio of the mass of fruit to the vegetables is 
Suppose
is the total mass of stuff
For vegetables, we can write

For fruits
