Asap! 30 points! there are a total of 78 baseball and football cards in a box. the ratio of baseball cards to football cards 8 : 5. how many baseball cards in the box?

What is the value of x in the diagram below?

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'