Answer:
angle 1, 5, 7
Step-by-step explanation:
angle 3 = angle 1 (vertically opp angles)
angle 3 = angle 5 (alt angles, parallel lines)
angle 3 = angle 7 (corresponding angles, parallel lines)
Topic: angle properties
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Step-by-step explanation:

Answer:
100 students
Step-by-step explanation:
10% of students in 7th grade ----- 10 students
<em>Divide</em><em> </em><em>by</em><em> </em><em>1</em><em>0</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>:</em>
1% of students in 7th grade ----- 10 ÷10= 1 student
<em>×</em><em>100</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>:</em>
100% of students in 7th grade ----- 1 ×100= 100 students
Answer:

Step-by-step explanation:
Given
The x and y values
Required
Determine the constant of proportionality
This is calculated from:

Pick any corresponding x and y values:
and 
Substitute 8 for x and 2 for y in 

Make r the subject


Pick another x and y values:
and 


<em>Hence, the constant of proportionality is 1/4</em>