Question

HELP ME ASAP!!!!!!!!

Answer 1

The lie is #3

Explanation:

The only way to solve this is by testing each equation to see if it's true. Remember that dividing powers with the same base, in this case b, means you're just subtracting the exponents.

Substituting 5 for y in #1 gives us the equation
`(b^9)/(b^5)=b^4`. This is the same as saying
`b^9^-^5=b^4`, which is true.

Substituting 7 for z and 2 for x in #2 gives us
`(b^7)/(b^2)=b^5`. Like we did for the first one, this is the same as
`b^7^-^2=b^5`, which is also true.

That means that #3 is a lie, but substituting 2 for x anyway gives us
`(b^8)/(b^2)=b^8`, or
`b^8^-^2=b^8`. This is not a true statement, and x would have to equal 0 for this to be true.