Calvin is using the formula A=3r ^2 to estimate the area of a circle. Solve the formula for r.

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

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?