First, you have to substitute for x, which would make the problem f(x)=7.45(-4.3)+33.7
Now, you just have to use the PEMDAS method (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction)
f(x)= -32.035+33.7
f(x)=1.665
No she can't spend $4.39 for each sandwich because if you divide 20 by 5 your quotient will be 4.
You take the numbers that are above 5 and put them up one to the next tenth then you do that the same for thousands. your anwser would be 900,000
