Assuming you're asking what an algebraic expression would look like...
It seems like the total is 45° and one of the variables were 7.
Answer:
its the mean for the data, its showing you the average studying time
Answer: you forgot attachment
Step-by-step explanation:
Answer:x=7
Step-by-step explanation:
180=112+9x+5
Collect like terms
180-112-5=9x
63=9x
Divide both sides by 9
63/9=9x/9
7=x
x=7