Aboy has a lemonade stand with a cash box that has 22 coins in it. if the coins are made up of nickles and
half dollars and have a value of $5.15, how many of each coins does he have in the cash box?
he has
nickles and
half dollars.
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Step-by-step explanation:

Let be "n" the number of nickels the boy has in the cash box and "h" the number of half dollars the boy has in the cash box.

Set up a system of equations:

You can use the Elimination method to solve the system. Multiply the first equation by -0.5, add both equations and then solve for "n":

Finally, substitute the value of "n" into the first equation and solve for "h":

answer

the correct answer is

explanation

the given function is

the excluded values are obtained by solving:

we factor to obtain:

the excluded values are

answer: i think it is (1,-2)