He is not correct because 3.5 is actually 3 and 1/2
not 3/5
hope that helps @:)
1 plus 2 = 3, then u do 6/2 (3), then 3x3 = 9
When they say quotient, they want a fraction, so the answer for that would be

and the decimal form of that would be 0.6. You can get that from dividing 6 by 10 and solving with long division.
Answer:
the alternate interior angle of angle 5 is angle 4
the measurement of this angle is 70°
angle 3 is 110°
the alternate interior angle of 3 is angle 6
the measurement of this angle is 110°