When david emptied the collection canister of his vacuum cleaner, he found nickels and quarters among the other of the canister. when he counted the coins, he found that the number of quarters he counted was three less than number of nickels he counted. he has 21 coins in all.

he has 9 quarters and 12 nickles.

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.

my guess would be b and d, but i didn’t actually get out the pen and paper. lol