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nexus9112 [7]
3 years ago
12

I need help with this

Mathematics
1 answer:
Andre45 [30]3 years ago
4 0

Answer:

3 pairs for the price of two.

Step-by-step explanation:

$10 per pair

  • 3 x 2

then:

3 pairs costs $20

20/3 = $6.6667 each pair

  • Buy one and get 25% of the second

25% = 25/100 = 0.25

then:

first pair $10

second pair: 10 - (10*0.25) = 10 - 2.5 = $7.5

first + second pair = 10 + 7.5 = 17.5

2 pairs costs $17.5

17.5/2 = $8.75 each pair

then:

the best deal:

3 pairs for the price of two.

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Answer:

3X^{2} - 12X - 36 = 0

Step-by-step explanation:

6 and - 2 are the only two solutions to the required quadratic equation.

So, if the variable is represented by X then (X - 6) and (X + 2) will be the only two factors of the polynomial function.

Therefore, the equation is  

(X - 6)(X + 2) = 0

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If the leading coefficient of the equation is 3 then we can write the equation as 3X^{2} - 12X - 36 = 0 (Answer)

6 0
3 years ago
The ratio of youths to adults at a skating rink is 13:7. What percent of these people are youths?
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Answer:

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Step-by-step explanation:

We can interpret the question to have two equation which can be solve simultaneously

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a-b=2------------(2)

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