Find the next letter in the sequence w, t, q, n, k, h

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

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.