81÷s = 90÷100
s= 81 x 100 ÷ 90
s= 90
81 students is 90% of 90 students
Answer:
Blablabka
Step-by-step explanation:
Blablabla
A = 2
b = 0
2a + 2b = 4 → 4a + 4b = 8
(4a + 4b = 8) - (4a - 3b = 8) → 7b = 0
b = 0
so a = 2
Answer:
162
Step-by-step explanation:
20 divided by 2
10
---
28 - 10
18
3^2 is 9
so, 9 x 18 = 162.
Let's break it down again, just for extra clarification.
20÷2 = 10
28 - 10 is 18.
3^2 is 9.
9 x 18 = 162
The answer is 162.
We have 7 = (-5) + 12;
19 = 7 + 12;
31 = 19 + 12 ;
