Answer:
5n/2
Step by Step Explanation:
Well, 5 times a number (the number is a variable so you just put it next to the 5) and 2 so you are dividing by 2 and the fraction bar is the same as division so 5n/2
the triangle above is an isoceles triangle
therefore the base angles are equal
So we have:
X + X + 38= 180
2x = 180-38
2x = 142
X = 71°
If a is equal to 7 it would be 11. 7+4
Step-by-step explanation:
