Math
posted by Christina on .
I am solving inequalities then graphing my solution. in a problem such as
2(c1)<22
how do i solve this? and also how do i know the greater then less then sign is going the right way?

2(c1)<22
first divide both sides by negative 2 !! BUT !! remember that when you multiply (or divide) both sides of an inequality by a negative number you reverse the direction of the arrow.
so
c1 > 11
c > 12
check
try c = 13
2(12) < 22 ?
24 < 22 right, good