Question

Please help me this has to be just a fake question 98 points

Answer 1

Answer:

-115.55

Step-by-step explanation:

7/4 -9÷ .08 + 4/5 -7 * .8

I would change fractions to decimals

1.75 - 9 ÷ .08  +.8 -7 * .8

Now using pemdas, multiply and divide from left to right

1.75 -112.5 +.8 -7 * .8

1.75 -112.5 +.8 -5.6

Now add and subtract from left to right

-110.75+.8 -5.6

-109.95-5.6

-115.55

Answer 2

Let's try solving the problem using the order of operations method, otherwise known as PEMDAS.

$\begin{tabular}{c | l}Order of Operation & Required Operation \\\cline{1-2}1 & Parentheses () \\2 & Exponents e^{x} \\3 & Multiplication \times \\4 & Division \div \\5 & Addition + \\6 & Subtraction -\end{tabular}$

We are given this question :

$\mathrm {\frac{7}{4} - 9 \div .08 + \frac{4}{5} - 7 \times .8}$

Since there are no parentheses or exponents, let's multiply.

$\mathrm {\frac{7}{4} - 9 \div .08 + \frac{4}{5} - 5.6}$

The next step is to divide.

$\mathrm {\frac{7}{4} - 112.5 + \frac{4}{5} - 5.6}$

After that, add.

$\mathrm {\frac{7}{4} - 112.5 + 0.8 - 5.6}$

$\mathrm {\frac{7}{4} - 111.7 - 5.6}$

Finally, subtract the remaining terms.

$\mathrm {1.75 - 111.7 - 5.6}$

$\mathrm {-109.95 - 5.6}$

$\mathrm {-115.55}$

The final answer is -115.55.

I hope this helped solve the problem.

Good luck on your studies!