PLEASE HELP ME I’ve had this explained many times and just don’t understand.

Brent works part-time at a clothing store. he earns an hourly wage of $15. if he needs to earn more than $45 in a day and works for x hours a day, which inequality represents this situation? a. 15x > 45 b. 15x < 60 c. x > 60 d. 15x < 45 e. x < 60

If x+y+z=0 what is the value of [tex] {x}^{3} + {y}^{3} + {z}^{3} [/tex]

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)