Select the equivalent expression. \left(\dfrac{x^{4}}{7^{-8}}\right)^ {-7}=?(
7
−8

x
4

​
)
−7
=?left parenthesis, start fraction, x, start superscript, 4, end superscript, divided by, 7, start superscript, minus, 8, end superscript, end fraction, right parenthesis, start superscript, minus, 7, end superscript, equals, question mark
Choose 1
Choose 1

(Choice A)
A
\dfrac{x^{28}}{7^{56}}
7
56

x
28

​
start fraction, x, start superscript, 28, end superscript, divided by, 7, start superscript, 56, end superscript, end fraction

(Choice B)
B
{x^{-28}}\cdot{7^{-56}}x
−28
⋅7
−56
x, start superscript, minus, 28, end superscript, dot, 7, start superscript, minus, 56, end superscript

(Choice C)
C
\dfrac{x^{28}}{7^{-56}}
7
−56

x
28

​

step-by-step explanation:

i found the koficent of the linear function and i foun c acordind to the strict formula y=kx+c and then i took 2 as an x and replacet it on the formula i found and then foun the y

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

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step-by-step explanation:

answer: your correct answer is b. d.

step-by-step explanation: