Answer with proof in attachment.
Answer:
Step-by-step explanation:
531.55 = 125% of x = 1.25x
x = 531.55/1.25 = 425.24
Mandy: $16.25
Jermey: $16.25 + $3.40 = $19.65
Lily: $19.65 x 2 = $39.30
For Lily you would take the total of Jermey and times it by 2.
Yesterday, 1/4 of 80 =20 gave their speeches, so there are 80-20=60 students left.
Today, 2/5 of 60=24 students gave their speeches, so there are 60-24=36 students who still haven't give their speeches
another way to think of it is 80*(1- 1/4)*(1- 2/5)=80*(3/4)*(3/5)=36
