Bagels = x
sesame bagels = x/3 = 72
x/3=72
x=72x3
x=216
I got that x equaled -5? Sorry it seems like none of those are your answer choices.
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 .
Answer:
-8/21
Step-by-step explanation:
D+100+40=180
d=180-100-40=40 (sum of all angles)
e= 100+40= 140 (exterior angle)
180-140=40
C+50+40=180
C=180-50-40= 90 (right angle)
A=50
B=180-90-50= 40
