Ineed this for , 50 points for first answer

17.) x<3
so we started out with our equation below
3x + 1 < 10 in order to find x we have to get it aloneso lets subtract the 1           - 1 <  - 1      from both sides
awesome it cancels out on the left hand side. and the right side of the equation is now 9. lets rewrite what our equation looks like now.
3x < 9    from here its simple we divide 3 by both sides to get x alone
/3     /3      the 3s on the left side are canceled out now. lets solve the rest:)
x < 3
your answer is x is less than 3 :)

18.)now for this equation we just need to plug in our value for x and y 
yx - 3 is our equation so what would we do if we knew what x and y were?
they give us the numbers x = -2 and y = -4 
so lets plug them in with parentheses:)
(-4)(-2) - 3
first lets multiply the -4 and -2 together 
-4 x -2 = 8!!
so in their place lets put 8
8 - 3 looks simple now. right? 
8 - 3 = 5
your answer to 18 is 5!!
hope this helps you out:)

Do the inverse operation