2 To determine if the class understood the fractions lesson, Mrs. Norris asked random students to solve a problem. Out of the students that answered, 80% were correct. In a class of 30 students, how many students would you expect to understand the lesson?​

69

step-by-step explanation:

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.

the easiest way to do these would be to solve the equations. if you can solve the equation than you can solve these problems.