Nick o’ time, the plumber, charges $30 per hour. his brother ivan, the plumber’s , charges $20 per hour. nick starts working on a job. four hours later ivan joins him and both work until the job is finished. if they make a total of $470, how long did they work together?

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Which polygon is she in the process of constructing ?