Answer:

Step-by-step explanation:
→ Substitute in the numbers

→ Simplify

Everything = 180 degrees
2X = 180 - 40 - 40 -30
2x = 70
X= 35
As simple as it can go is As it's multiplied out form, which is -42.
x + 47 = 92. <--- x represents the number of 3rd graders
x +47-47 = 92-47
x=45
There are 45 third grader. Hope this helped!
Answer:
The Correct Answer are B and D
Step-by-step explanation: