When you deposit $50 into your account, you add it to the amount already in your account. (Some people oversee this error and assume the account has a balance of 0.)
So you add 50 to x, our variable, and then subtract 20 from it because we withdrew $20.
So the amount remaining is x+30.
However, the question asks for every amount to be written as an integer. Let's say that 50 is a, 20 is b, and the original amount is x.
The equation would be x+a-b.
Answer:
-4
Step-by-step explanation:

Hope this helps!
Answer:
y=(x*9)-4
Step-by-step explanation:
for example:
0*9=0
0-4=-4
4*9=36
36-4=32
2*9=18
18-4=14
hope this helped ;)
Answer:
139.5 mm
Step-by-step explanation:
The area of a geometric shape with all sides of equal length is:
A (1/2)nsr
n = the number of sides
s = the length of the sides
r = the length of the apothem
The apothem is the line going from the center point of the shape to the middle of one of the sides.
A = (1/2)(5)(9)(6.2)
A = (1/2)279
A = 139.5 mm