To get the simple interest, we must use the formula: I= (p)(r )( t)
So, in this one we need to multiply $900x18x9.% and the answer will be $128.25. This is the amount of interest they are going to pay per year.
ANSWER

and

EXPLANATION
Since corresponding angles are equal,

Alternate angles are also equal, therefore,

Equation (2) minus equation (1) gives,


We put
in to equation (1)



Eighty seven written in standard form would be...
80 + 7 = 87
Good Luck! :)
5 pounds= 80 ounces
total cost= ($0.44×1)+($0.20×79)=$16.24
Answer:
3x+9=180(angles on a line
3x=180-9
3x=171
x=171/3
x=57