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Crank
3 years ago
13

PLEASE ANSWER QUICK

Mathematics
1 answer:
makvit [3.9K]3 years ago
3 0
For the first equation, I put it in y=mx+b form, so y=-3x-9
the second one is x=4
hope i helped 
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120 pianists compete in a piano competition. (a) In the first round, 30 of the 120 are selected to go on to the next round. How
MissTica

Answer:

Step-by-step explanation:

Given

There are 120 Pianist in a competition

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this can be done in ^{120}C_{30} ways

=\frac{120!}{(120-30)!30!}

=\frac{120!}{90!30!}

(b)In the second round 5 pianist is selected out of 30

this can be doe by =\frac{30!}{(30-5)!5!}

=\frac{30!}{25!5!}

=142,506

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Answer:

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Step-by-step explanation:

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1

Since the discriminant is greater than zero, there are two real solutions

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