Final answer:
To simplify the given expression, we perform the necessary operations, including addition, subtraction, multiplication, and division, following the order of operations. The final result of the expression is -32.22.
Step-by-step explanation:
To simplify the expression, we would first perform the operations inside the parentheses.
-3 and seven tenths + 9 and 15 hundredths = 5 and 85 hundredths (When adding mixed numbers, we first add the whole numbers and then add the fractions).
Now we have: -15 + 5 and 85 hundredths divided by 5 all times 3 squared minus 4 and 7 tenths - 13.16 - 9.89
Simplifying further, we get: -15 + 5.85 / 5 * 3^2 - 4.7 - 13.16 - 9.89
Next, we calculate the exponent and the division, and then perform the addition and subtraction from left to right:
-15 + 5.85 / 5 * 9 - 4.7 - 13.16 - 9.89
= -15 + 1.17 * 9 - 4.7 - 13.16 - 9.89
= -15 + 10.53 - 4.7 - 13.16 - 9.89
= -15 + (10.53 - 4.7) - (13.16 + 9.89)
= -15 + 5.83 - 23.05
= -32.22
Therefore, the simplified expression is -32.22.