There are 30 students in a class, among them,8 are learning both english and french. a tital of 18 students are learning english, if every student is learning at least one language, how many students are learning french in total?

20 i think

Step-by-step explanation:

There're already 8 students learning French so we will have 8 first.

If every student learn at least 1 language then the we must -18 ( because there're 18 students learning English)

Then the final equation would be:

30-18+8=20

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.