Join IDNLearn.com and start getting the answers you've been searching for. Our experts are available to provide accurate, comprehensive answers to help you make informed decisions about any topic or issue you encounter.

Evaluate the following expression:

(iv) [tex][tex]$\left(\frac{15}{4}\right)^{-1} \times\left(\left(\frac{12}{15}\right)^{-1} \div\left(\frac{144}{225}\right)^{-1}\right)$[/tex][/tex]


Sagot :

Let's evaluate the given expression step-by-step.

Given:
[tex]\[ \left(\frac{15}{4}\right)^{-1} \times\left(\left(\frac{12}{15}\right)^{-1} \div\left(\frac{144}{225}\right)^{-1}\right) \][/tex]

### Step 1: Calculate the inverse of each fraction.
1. The inverse of [tex]\(\frac{15}{4}\)[/tex] is [tex]\(\left(\frac{15}{4}\right)^{-1}\)[/tex].
[tex]\[ \left(\frac{15}{4}\right)^{-1} = \frac{4}{15} \approx 0.2667 \][/tex]

2. The inverse of [tex]\(\frac{12}{15}\)[/tex] is [tex]\(\left(\frac{12}{15}\right)^{-1}\)[/tex].
[tex]\[ \left(\frac{12}{15}\right)^{-1} = \frac{15}{12} = 1.25 \][/tex]

3. The inverse of [tex]\(\frac{144}{225}\)[/tex] is [tex]\(\left(\frac{144}{225}\right)^{-1}\)[/tex].
[tex]\[ \left(\frac{144}{225}\right)^{-1} = \frac{225}{144} \approx 1.5625 \][/tex]

### Step 2: Perform the division inside the parentheses.
We need to divide the inverse of [tex]\(\frac{12}{15}\)[/tex] by the inverse of [tex]\(\frac{144}{225}\)[/tex].
[tex]\[ \frac{15}{12} \div \frac{225}{144} = \frac{15}{12} \times \frac{144}{225} \][/tex]
Simplify the fraction:
[tex]\[ = \frac{15 \times 144}{12 \times 225} = \frac{2160}{2700} = \frac{8}{10} = 0.8 \][/tex]

### Step 3: Multiply with the inverse of [tex]\(\frac{15}{4}\)[/tex].
[tex]\[ \left(\frac{15}{4}\right)^{-1} \times\left(\left(\frac{12}{15}\right)^{-1} \div\left(\frac{144}{225}\right)^{-1}\right) \][/tex]
[tex]\[ = \frac{4}{15} \times 0.8 = 0.2667 \times 0.8 = 0.2133 \][/tex]

### Final result:
[tex]\[ 0.2133 \][/tex]

Thus, the evaluation of the given expression is approximately [tex]\(0.2133\)[/tex].