Choose all that correctly give an equivalent expression using only positive exponents. x-2y2z-3 = y2 x2z3 x3y-2z4 = x3z4 y2 x-3 y-2z2 = y2 x3z2 x-5 y-4z-2 = y4z2 x5 x3y-4 z-6 = x3z6 y4

1. Correct

2. Correct

3. Incorrect

4. Correct

5. Correct

Step-by-step explanation:

Recall that: and

1. The first expression is . We rewrite as positive index to get:

2.  The given expression is

3. The given expression is: <-------This is the correct expression Not

4. The expression is  

5. The expression is  

the balance is found at the link

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl