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Evaluate the following expression:
[tex]\[ -\frac{1}{35} \div \frac{-11}{12} \times 7 \div \frac{-9}{22} \][/tex]

A. [tex]\(\frac{8}{15}\)[/tex]

B. [tex]\(-1 \frac{7}{8}\)[/tex]

C. [tex]\(-\frac{8}{15}\)[/tex]

D. [tex]\(1 \frac{7}{8}\)[/tex]


Sagot :

To solve the given mathematical expression:

[tex]\[ -\frac{1}{35} \div \frac{-11}{12} \times 7 \div \frac{-9}{22} \][/tex]

we need to follow these steps:

### Step 1: Simplify the division of fractions

Recall that dividing by a fraction is the same as multiplying by its reciprocal. Therefore, we can rewrite the division operations as multiplication operations.

#### Simplifying [tex]\(-\frac{1}{35} \div \frac{-11}{12}\)[/tex]:

[tex]\[ -\frac{1}{35} \div \frac{-11}{12} = -\frac{1}{35} \times \frac{12}{-11} \][/tex]

Simplify the multiplication of fractions:

[tex]\[ -\frac{1}{35} \times \frac{12}{-11} = \frac{1}{35} \times \frac{12}{11} \][/tex]

Multiply the fractions:

[tex]\[ \frac{1 \times 12}{35 \times 11} = \frac{12}{385} \][/tex]

#### Simplifying [tex]\( 7 \div \frac{-9}{22} \)[/tex]:

[tex]\[ 7 \div \frac{-9}{22} = 7 \times \frac{22}{-9} \][/tex]

Simplify the multiplication of fractions:

[tex]\[ 7 \times \frac{22}{-9} = \frac{7 \times 22}{-9} = \frac{154}{-9} = -\frac{154}{9} \][/tex]

### Step 2: Multiply the intermediate results

Now we multiply the two intermediate results:

[tex]\[ \frac{12}{385} \times -\frac{154}{9} \][/tex]

Multiply the numerators and the denominators:

[tex]\[ \frac{12 \times -154}{385 \times 9} = \frac{-1848}{3465} \][/tex]

Simplify the fraction:

[tex]\[ \frac{-1848}{3465} = -\frac{8}{15} \][/tex]

### Final Result

Thus, the value of the given expression is:

[tex]\[ -\frac{8}{15} \][/tex]

So, the correct answer from the given choices is:

[tex]\[ -\frac{8}{15} \][/tex]
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