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Tema [17]
2 years ago
14

If Jan can buy 12 copies of a certain book for $40, what is the unit rate for cost per copy? How much

Mathematics
1 answer:
natita [175]2 years ago
7 0

Answer:

12 copies=$40

1 copy=$40÷12=$3.33

18 copies=$3.33×18=$60

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Among all pairs of numbers with a sum of 105 , find the pair whose product is maximum. Write your answers as fractions reduced t
Bond [772]

Answer: Hence Pair( x, y) = [ 105/2, 105/2]

Step-by-step explanation:

Given that;

Among all pairs of numbers with a sum of 105;

the pair whose product is maximum = ?

so let pairs of numbers with a sum of 105 be x and y respectively

x + y = 105

let y = 105 - x

now

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now

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for maximum value of p

dp/dx =0

⇒ dp/dx = 105 - 2x = 0

2x = 105

x = 105/2

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y = 105 - x

y = 105 - 105/2 = 105/2

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88 cm³

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3 0
2 years ago
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AnnZ [28]

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Step-by-step explanation:

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Thus, the shoe sizes of humans are discrete random variables.

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