Question

-8r+8<-2(3r-9) solve the inequality and reprersent your answer in a set builder notation?

Answer 1

r > -5

Answer 2

Thanks! but i dont know anything whit this one I have to show how i got this answer if you show me how to start it off i may can get back to you with how i got the answer.

Answer 3

-8r+8<-2(3r-9)


-8r+8<-6r+18


-8r<-6r+18-8


-8r+6r<18-8


Do you see where to go from here?

Answer 4

not at all very lost trying to look in my math book for an example that may help me get to the answer that was given.

Answer 5

so do you want me to keep going?

Answer 6

yes i guess the answer will help me for now but not when i have to take the test.

Answer 7

-8r+8<-2(3r-9)


-8r+8<-6r+18


-8r<-6r+18-8


-8r+6r<18-8


-2r<10


r > 10/(-2) ... Note: the sign flips because we're dividing both sides by a negative number


r > -5

Answer 8

so do you mean i only needed to change all the + to - to come up with this answer

Answer 9

not sure what you mean

Answer 10

instead of adding i should be subtracting? and then divide

Answer 11

oh, I'm subtracting 8 from both sides in step 3

then I'm adding 6r to both sides in step 4

This is so I get all the 'r' terms on one side (and everything else on the other)

Answer 12

then I combined like terms, after that I divided both sides by -2