Answer:

Step-by-step explanation:
As the triangles are similar :
45/55 = (12x - 3)/143
9/11 = (12x - 3)/143
9 x 13 = 12x - 3
12x = 117 + 3
12x = 120
x = 10
Answer:
The decimal number is multiplied by 100
Step-by-step explanation:
Answer :
1
Step-by-step-explanation :


Answer:
The answer is A.
Step-by-step explanation:
Firstly, you have to take out the common terms for this expression. In this expression, the common terms ard 2 and m :



Next you have to factorise the brackets :





So the final answer is :

An example of the ratio 4:1 could be, in a school for every 4 girls there is 1 boy. Or something similar:)