m∠3 = 180 - m∠8 = 180 - 123 = 57
m∠1 = m∠3 = 57°
Its quite simple. All you have to due is substitute the numbers they gave you for each letter. So.... it would look like this > 5(2) + 3(5) - 2(4) = ? Now all you have to do is solve it! Hope this helps :)
Answer:

Step-by-step explanation:
20 is greater than y.
He will use 33 containers because 9 goes into 296 32.8 times but you cant have .8 of a container so you round it up to 33
Answer:
3 lines of symmetry
Step-by-step explanation:
the lines go through the vertices of the triangle