Question

Evaluate the expression when x=-1 and y = 4

9x ^-5 y^-2
___________
y

Answer 1

@satellite73

Answer 2

\[\frac{ 9x^{-5}y^{-2} }{ y }\] like this?

Answer 3

yes

Answer 4

example..\[y^{-3}=\frac{ 1 }{ y^3 }\]

Answer 5

\[\frac{ 9x^{-5}y^{-2} }{ y }=\frac{ 9 }{ x^5y^{2+1} }\]

Answer 6

\[=\frac{ 9 }{ x^5y^3 }\]Then,substiute x=-1 and y=4 into the expression

Answer 7

\[=\frac{ 9 }{ (-1)^5\times(4)^3 }\]

Answer 8

so what is the value for\[(-1)^5\]?@Opentowherelifeis

Answer 9

would it be - 9 over 64

Answer 10

correct!

Answer 11

yay . THANKS FOR THE HELP :) here is your medal

Answer 12

(-1)^5 gives u -1 and (4)^3 gives u 64 \[=\frac{ 9 }{ -1\times64 }\]\[=-\frac{ 9 }{ 64 }\]

Answer 13

np :)