Question

help inequalities!

Answer 1

numbers
21.
25.

Answer 2

the pdf file

Answer 3

the idea to isolate z

-8z + 3 > -21

-8z + 3-3 > -21-3 ... Subtract 3 from both sides.

-8z + 0 > -24 ... Combine like terms.

-8z > -24

-8z/(-8) < -24/(-8) ... Divide both sides by -8. ****

1z < 3

z < 3

So the solution is z < 3


*** the inequality sign flips when you divide both sides by a negative number

Answer 4

*the idea is to isolate z*

Answer 5

oh i get it thanks

Answer 6

21) -8z + 3 > -21
first subtract by 3 to both sides. giving us
-8z + 3 - 3 > -21 - 3
-8z > -24
divided by -8 to both sides, it can be
-8z/-8 < -24/-8 (u have to reverse the sign of ineq.)
z < 3
25) y - 5 >= -4
add by 5 to both sides :
y-5+5 >= -4 + 5
y >= 1

Answer 7

25. left

Answer 8

thank you