Y=3x+-1
I think you just fill in the points that the line shows so yeah
Solution: Mark's initial amount 
Mark invest's his inheritance amount in savings account with an annual interest of 3.1%. Therefore, the Mark's interest amount after 1 year is:



Therefore, total amount Mark will have after 1 year
=$30930
Now Charles also has $30000 from his inheritance.
Charles invests his inheritance in a CD paying 5.8% annual.
Therefore, interest amount for Charles after 1 year is:



Therefore, total amount Charles will have after 1 year
=$31740
Therefore, Charles will have $31740 - $30930 = $810 more than Mark
Answer:
$4.50
Step-by-step explanation:
Okay so, first add both.
50+40 is 90, then multiply 90 by the tax percent which is
90x5%=4.5
If expression then,
x=money that they have to pay.
5%(50+40)=x (the original)
btw there's already a question like this :
brainly.com/question/19455247