One equation in a system is 4x – 2y = 8. Which equation gives the system no solution?

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

The ratio of men to women working for a company is 4 to 5 . if there are 90 women working for the company, what is the total number of employees?

M.xyz =radians. covert this radian measure to its equivalent measure in degrees.