PLEASE HELP Suppose cos(x) = 1/sqrt5 and sin(x) > 0. What is the value of tan(2x)?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers