#9
3/8 x 4/11 = 3/22
#12
9/20 x 4/5 = 9/25
We know: the sum of measures of triangle angles is 180°.
Therefore we have the equation

Substitute
:

<h3>Answer: 180 - 7x</h3>
Answer:
18x^2
Step-by-step explanation:
You're basically just multiplying them together :)
4250 millimeters.
Half of 8.5m is 4.25m.
4.25 m to mm is 4250.
Answer:
-6.3
Step-by-step explanation: