There are 84 students in a speech contest. Yesterday, 1/4 of them gave their speeches. Today, 3/7 of the remaining students gave their speeches. How many students still haven't given their speeches?

36

Step-by-step explanation:

Total students un the contest = 84

Number of students who gave their speech yesterday:-

so 21 students gave their speech yesterday

= 63

Number of students who gave their speech today:-

Number of students who have given their speech:-

= 21 + 27

= 48

Number of students who still haven't given their speech :-

= total - 48

= 84 - 48

= 36

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

go on the tube you might find some information there