5z –45

Question

5z > –45

anonymous · Answer

Try dividing both sides by five

anonymous · Answer

z>-9

anonymous · Answer

Right

darkprince14 · Answer

that won't do..it's inequality we're talking about..

darkprince14 · Answer

transfer the -45 to the other side..

5z + 45 > 0

anonymous · Answer

@darkprince14  I don't understand your point. The purpose of this problem is to establish which values of z satisfy the inequality. It's like solving an equation for a variable, except that our solution may include a significant range of values rather than a set a finite number

darkprince14 · Answer

get it's domain...

it should be z> -9

then its domain would be z = ( -9, +infinity)

darkprince14 · Answer

@L.T. so try substituting -9 to z..
It will be like this...
5(-9) > -45
-45 > -45

That won't do bcause -45 can't be grater than -45...

darkprince14 · Answer

we're only finding points that may satisfy the inequality... it's a huge range though...

anonymous · Answer

The symbol shows that z is greater than 9: nine isn't included!

anonymous · Answer

@darkprince14

darkprince14 · Answer

yeah..that's why i made it an open interval... sorry didn't see your point earlier...sorry for being so childish...

darkprince14 · Answer

@L.T.

anonymous · Answer

It's fine