Let's try solving the problem using the order of operations method, otherwise known as PEMDAS.
[tex]\begin{tabular}{c | l}Order of Operation & Required Operation \\\cline{1-2}1 & Parentheses () \\2 & Exponents e^{x} \\3 & Multiplication \times \\4 & Division \div \\5 & Addition + \\6 & Subtraction -\end{tabular}[/tex]
We are given this question :
[tex]\mathrm {\frac{7}{4} - 9 \div .08 + \frac{4}{5} - 7 \times .8}[/tex]
Since there are no parentheses or exponents, let's multiply.
[tex]\mathrm {\frac{7}{4} - 9 \div .08 + \frac{4}{5} - 5.6}[/tex]
The next step is to divide.
[tex]\mathrm {\frac{7}{4} - 112.5 + \frac{4}{5} - 5.6}[/tex]
After that, add.
[tex]\mathrm {\frac{7}{4} - 112.5 + 0.8 - 5.6}[/tex]
[tex]\mathrm {\frac{7}{4} - 111.7 - 5.6}[/tex]
Finally, subtract the remaining terms.
[tex]\mathrm {1.75 - 111.7 - 5.6}[/tex]
[tex]\mathrm {-109.95 - 5.6}[/tex]
[tex]\mathrm {-115.55}[/tex]
The final answer is -115.55.
I hope this helped solve the problem.
Good luck on your studies!
