Antonio has a total of 55 marbles. He has 15 green marbles and 12 red marbles. The rest of the marbles are blue. How many blue m
2 answers:
Answer:
Antonio has blue marbles
Step-by-step explanation:
Let
x------> the number of green marbles
y------> the number of red marbles
z------> the number of blue marbles
we know that
-----> equation A
----> equation B
----> equation C
Substitute equation B and equation C in equation A and solve for z
Subtract both sides
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Given function :
Splitting terms to factor it out.
Making it into groups
(5x^3-x^2) + (-5x^2+x) + (-60x+12)
Factoring out GCF of each group.
Factoring x^2-x-12 into (x+3)(x-4)
Applying zero product rule.
5x-1 =0
x+3=0 and
x-4= 0
On solving
x = 1/5 , x=-3 and x=4.
Therefore, zeros of the given function are .