Question

if x= y-3 and y= z^2, what is x in terms of z

Answer 1

Plug \(y=z^2\) into the first equation, what would you get?

Answer 2

Hint: Substitution

Answer 3

still confused

Answer 4

The first equation \(x=y-3\), but y is the same as z^2 by the second equation. So
\[x=z^2-3\]

Answer 5

ughhh still not getting it im trying to solve it myself

Answer 6

Oh do you know what "x in terms of z" means?

Answer 7

no

Answer 8

It means to write x=some expression in z, likw x=z, x=2z+3, x=z^2+1, etc.

Answer 9

But you still need to satisfy the given equations.

Answer 10

so is the answer z^-2/3

Answer 11

The answer is \(x=z^2-3\).

Answer 12

but that's not one of the options

Answer 13

Then either your options are all wrong or you didn't write your question right! :D

Answer 14

Is it \(x=y-3\) or \(x=y^{-3}\)?

Answer 15

its x=y-3 and y=z^2 and the answers are A z^3/2 B z^5 C z^-6 D z^-2/3

Answer 16

Then your answer is C, but your question is \(x=y^{-3}\)...

Answer 17

ok thanks for helping me i appreciate

Answer 18

Anytime! :)