57-4t > (their is an egual sign under the less then sign)13
a. t< =-15
b. t< =15
c. t< =11
d. t=> -11

57 - 4t > = 13subtract 57 from both sides
-4t > = 13 - 57
-4t > = - 44 ...divide both sides by -4, and change the inequality sign
t < = -44 / -4
t < = 11

u solve inequalities much like u do equations except for one very important rule. In an inequality, if u divide/multiply by a negative number, u have to change the inequality sign.