Which polynomial identity will prove that 49=(2+5)^2

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

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?