Select the equivalent expression.
\left(\dfrac{3^{-6}}{7^{-3}}\right) ^{5}=? (
7
−3
3
−6
)
5
=? left parenthesis, start fraction, 3, start superscript, minus, 6, end superscript, divided by, 7, start superscript, minus, 3, end superscript, end fraction, right parenthesis, start superscript, 5, end superscript, equals, question mark
choose 1
choose 1

Step-by-step explanation:

The given expression is:

Moving the expression to the other side in the fraction changes its sign to opposite. A numerator with negative exponent, when written in denominator will have the positive exponent. Using this rule, we can write:

The exponent 5 can be distributed to both numerator and denominator as shown:

The power of a power can be written as a product. i.e.

So, the expression similar to the given expression and with positive exponents is:

The equivalent expression will be

Given the indices:

Using the law of indices which states:

The expression becomes:

Hence the equivalent expression will be

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second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

16.80 times .20= 3.36

step-by-step explanation: