Answer:
Step-by-step explanation:
so confused right now
Answer:
21 + 3a
Step-by-step explanation:
3 (7+a)
distribute 3 into parentheses:
21 + 3a
9/72
I forgot how to do this
1. it is right-angled triangle because it has a 90 degree angle.
To solve for the value of x, you can simply add all of the values and expressions together and make it equal to 180 degrees, since the sum of all angles in a triangle add up to this amount.
Then we can solve for X, by algebra.
