Answer:
6
Step-by-step explanation:
add 11 to both sides, that cancels out so then your left with 7x=42, divide by 7 on both sides then you should get x=6
Answer:

Step-by-step explanation:
Given

Required
Find

Calculate 
Using tan rule

So:






'
'So:



Answer:
7 and 3/4
Step-by-step explanation:
31/4=7-3
the remainder is 3/4
Answer:
-64
Step-by-step explanation:
A. -3+4i Square both numbers, add them, then find the square root. Essentially, use the Pythagorean theorem. -3^2 + 4^2 9 + 16=25 Square root of 25 is 5.