Supplementary angles
x+20+5x+10=180
6x+30=180
6x=150
x=25
Answer:
See below
Step-by-step explanation:
The mean score and the standard deviation are needed
Answer:
x + 3 + 
Step-by-step explanation:
Using long division
x + 3 ← quotient
--------------------------
x - 3 | x² + 0x + 4
x² - 3x ↓
------------------------
3x + 4
3x - 9
-----------------------
13 ← remainder
Thus
= x + 3 + 