Problems 21-40 21. Which equations system has no solution? 22. What is the value of the angle y? 23. What is the value of x? 24. What is possible sum of those 6 numbers? 25. Which set has divisible sum by each numbers? 26. Simplify the expression 27. Product of the polynomials 28. Division and remainder 29. What is the correct statement? 30. Subtracting negative from negative 31. Which value is not possible? 32. What is the value of cos theta? 33. Select the correct value 34. What is the larger number? 35. What is the area of the smaller cube? 36. Select the correct statement 37. What is the value of x? 38. What is the value of xy^2? 39. What is the circumference of a semicircle? 40. What is the perimeter of the triangle?