Question

(1 point)
Evaluate the left-hand side to find the value of a in the equation in simplest form
x5/3/x6/5 =x^a

a=4/15
A is equal to 4 over 15

a=43/15
A is equal to 43 over 15

a=7/15
A is equal to 7 over 15

a=1/2

1 answer

To solve the equation \(\frac{x^{5/3}}{x^{6/5}} = x^a\), we can use the property of exponents \(\frac{x^m}{x^n} = x^{m-n}\).

Now, we can rewrite the left-hand side:

\[ \frac{x^{5/3}}{x^{6/5}} = x^{5/3 - 6/5} \]

Next, we need to compute \(5/3 - 6/5\). To perform this subtraction, we need a common denominator. The least common multiple of 3 and 5 is 15. So we will convert each fraction:

\[ 5/3 = \frac{5 \cdot 5}{3 \cdot 5} = \frac{25}{15} \]

\[ 6/5 = \frac{6 \cdot 3}{5 \cdot 3} = \frac{18}{15} \]

Now we can subtract:

\[ \frac{25}{15} - \frac{18}{15} = \frac{25 - 18}{15} = \frac{7}{15} \]

So, we have:

\[ \frac{x^{5/3}}{x^{6/5}} = x^{\frac{7}{15}} \]

Therefore, the equation simplifies to:

\[ x^{\frac{7}{15}} = x^a \]

This implies that:

\[ a = \frac{7}{15} \]

Thus, the value of \(a\) is \(\frac{7}{15}\).

So the correct answer is:

\(a = 7/15\)
A is equal to 7 over 15.

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