Answer:
k = 20
Step-by-step explanation:
310-(30x7) = 5k
310-210=5k
100=5k
/5 /5
20=k
It would be 90m3 because all the angles are the same
Answer:
4.8 sheets of paper
Step-by-step explanation:
You just need to divide 120 by 25 students. The reason for that is because you need to find out how much *each* student has.
120/25 = 4.8
As a fraction
Mixed = 4 4/5
Improper = 24/5
The unit rate is any of these answers! Don't forget your units :)
I'm going to show you two ways to do it.
Way #1 is the slogging way.
Way #2 is the clever way.
Way #1:
' One hundred percent ' means ALL of something.
ALL of the students in the school is the same as 100% of them.
If 10% are absent, then 90% are present.
90% means 0.9 .
1620 students = 90% of the school.
1620 = 0.9 x school total
Divide each side by 0.9: 1620/0.9 = total school
1800 = total school
How many were absent ?
10% of them.
10% means 0.10 .
0.10 x 1800 = 180 students absent .
_______________________________________
Way #2:
' One hundred percent ' means ALL of something.
ALL of the students in the school is the same as 100% of them.
==> If 10% are absent, then 90% are present.
==> The number of students present is 9 times the number who are absent.
1620 = 9 x the number absent
Divide each side by 9 : 1620 / 9 = the number absent
1620 / 9 = 180 absent .
