A jar contains n nickels and d dimes there are 20 coins in the jar, and the total value of the coin s is one dollar and forty ce
1 answer:
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Answer:
<h2>A</h2>Step-by-step explanation:
la recta:
(*)
P=(xo,yo)
substituindo:
Seja P=A=(xo=1,yo=3), utilizando a formula (*)