At the start of the year, Billy had 45 fish in his tank. By the end of March, 2/5 had passed away. By the end of June another 7 fish had died. By August, 20% of the remaining fish also died. How many fish
were left?

What is sin 7x/4 ? i need on this urgent trig

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?