use the properties of operation and rules of multiplying and dividing to solve:

(9) * (5/4) x (7/9) x (-5) * (7/2)
8
1,225/8
-8
- 1,225/8

1 answer

To solve the expression \((9) * \left(\frac{5}{4}\right) \times \left(\frac{7}{9}\right) \times (-5) * \left(\frac{7}{2}\right)\), we can simplify this step by step.

  1. First, let's rewrite the expression: \[ 9 \times \frac{5}{4} \times \frac{7}{9} \times (-5) \times \frac{7}{2} \]

  2. Rearranging and grouping the terms: \[ = 9 \times \frac{7}{9} \times \frac{5}{4} \times (-5) \times \frac{7}{2} \]

  3. Notice that the \(9\) and \(\frac{7}{9}\) can be simplified: \[ = 1 \times \frac{5}{4} \times (-5) \times \frac{7}{2} \] This simplifies to: \[ = \frac{5}{4} \times (-5) \times \frac{7}{2} \]

  4. Now, multiplying the numbers: \[ = (-5) \times \frac{5 \times 7}{4 \times 2} \] \[ = (-5) \times \frac{35}{8} \]

  5. Finally, multiply: \[ = \frac{-175}{8} \]

Thus the simplified result is: \[ -\frac{175}{8} \]

However, this does not seem consistent with the provided options. Let's revisit and recalculate the multiplication more clearly in steps.

  1. Start with: \[ 9 \times -5 = -45 \]

  2. Now, we compute: \[ -45 \times \frac{5}{4} = -\frac{225}{4} \]

  3. Next, we compute: \[ -\frac{225}{4} \times \frac{7}{2} = -\frac{225 \times 7}{4 \times 2} = -\frac{1575}{8} \]

Finally, considering \( -\frac{175}{8} \) seems erroneous, upon reviewing calculation paths, we have ended at: \[ -\frac{1575}{8} \]

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