Please help me In how many ways can we give six identical pens to three students (note that a student can get zero pens)
Let A be a set of natural numbers from 1 to 10. How many ordered triples (x, y, z) are there such that x belongs to A, y belongs to A and z belongs to a. Also x

In an arithmetic progression, a5+a8+a11=28, and a14+a17+a20 =44. Find common difference.

Given sin=-4/5 and x is in quadrant 3, what is the value of tan x/2

5. your analysis of child assessment data shows that a few of the students in your classroom are lethargic and exhibit challenging behaviors before snack time. you note that after snack time and lunch, they're engaged and responsive. what other information might you understand why? a. attendance data, teacher observation checklists, and frequency counts b. anecdotal notations, attendance data, and child health records c. family interviews, daily health check, and behavioral logs d. standardized assessments, time samples, and conversations with other teachers

Arrange the following in order from the shortest wavelength to the longest wavelength. visible light gamma rays radio waves x-ray waves microwave infrared