If a building contractor hires 8 day laborers and concrete finisher​, his payroll for the day is ​$1414. If he hires 1 day laborer and 4 concrete​ finishers, his daily cost is ​$913. Find the daily wage for each type of worker. Solve the problem using matrices.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

What is a possible solutions of the x> 3?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?