Question

http://mywaycool.unl.edu/ishs_course_images/MTHH032060/evals/images/eval02g029.gif

Answer 1

for x = –1, y = 5, and z = 3.

Answer 2

straight substitution

Answer 3

just substitute -1 by x and 5 by y and 3 by z !! :)

Answer 4

im lost

Answer 5

actually simplify it first then substitute.
-5/15 = -1/3
x^3/x^-7 = x^(3+7) = x^10
y^5/y^5 = 1

Answer 6

needs to = -9,-3,-1 or 0

Answer 7

so im confuzed

Answer 8

have you ever divided variables with exponents ?
Ex:
whats x^4/x^2

Answer 9

100

Answer 10

if x is 10

Answer 11

correct...x^4/x^2 = x^(4-2) = x^2
10^2 = 100

Answer 12

so thats all you're doing here, combining variables by subtracting their exponents

Answer 13

but i dont understand the answer

Answer 14

well after you combine variables, you have to plug in the given values for the variables just like you used 10 for x above.

Answer 15

is it -1

Answer 16

\[\rightarrow \frac{-x^{10}}{3z^{-2}} = \frac{-x^{10}z^{2}}{3} = \frac{-(-1)^{10}(3)^{2}}{3} = \frac{(-1)(9)}{3} = -3\]

Answer 17

ty