Answer:
and 
Step-by-step explanation:
Given

per section

Required
Model the scenario
The model of this scenario is:

This gives:
<em />
<em> -- This represents the multiplication model</em>
Divide both sides by 18



Reorder
<em />
<em> -- This represents the division model</em>
Answer:
Obtuse Triangle
Step-by-step explanation:
When there is an angle with a measurement greater than 90 degrees, the triangle is an obtuse triangle.
Answer:
Step-by-step explanation:
Answer:
216 boys
Step-by-step explanation:
450 students: 20% girls, 80% boys
450*20%=90 girls
450*80%=360 boys
Students having mobile phones: 40% (OF THE 90) girls, 60% (OF THE 360) boys
90*40%=36 girls
360*60%=216 boys
[We honestly don't need to care about the girls without mobile phones as they are only asking how many boys have mobile phones]
Answer:
are we supposed to multiply
Step-by-step explanation: