Find f(6) if f(x) = x2 + 3 + x.
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Which matrix can be multiplied to the left of a vector matrix to get a new vector matrix ?

Plz me i need i will give a brain

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?