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3 years ago

Cayenne bought 20 pencils for 1.60 dollars at that rate how much would 35 pencils cost

Mathematics

1 answer:

yanalaym [24]3 years ago

4 0

35 pencils would cost $2.80,

$1.60 / 20 = $.08
Each pencil costs $0.08 each

.08 * 35 = 2.80

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Each year lizzy e's school purchases students agenda books, which are sold in the school store.This year, the school purchased 3

notsponge [240]

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They want to make this amount by selling 350 agendas, so divide the amount they want to make by 350 to find the amount per book:
$2637.5/350=7.54$
I rounded the answer to the nearest hundredth because the hundredth is the smallest amount we have in USD (the penny.)
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2 years ago

Write the product (4 + i)(4 − i) in the form a + bi. A. 16 − i B. 16 − i2 C. 17 D. 8

bonufazy [111]

Answer:

A.16–i is correct.

Step-by-step explanation:

(4+i)(4–i). [(a+b)(a–b)=(a²–b²)]

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I hope this answer is correct so please vote my answer

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3 years ago

A field bordering a straight stream is to be enclosed. The side bordering the stream is not to be fenced. If 1000 yards of fenci

sveta [45]

Answer:

x = 500 yd

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Step-by-step explanation:

Let´s call x the side parallel to the stream ( only one side to be fenced )

y the other side of the rectangular area

Then the perimeter of the rectangle is p = 2*x + 2* y ( but only 1 x will be fenced)

p = x + 2*y

1000 = x + 2 * y ⇒ y = (1000 - x )/ 2

And A(r) = x * y

Are as fuction of x

A(x) = x * ( 1000 - x ) / 2

A(x) = 1000*x / 2 - x² / 2

A´(x) = 500 - 2*x/2

A´(x) = 0 500 - x = 0

x = 500 yd

To find out if this value will bring function A to a maximum value we get the second derivative

C´´(x) = -1 C´´(x) < 0 then efectevly we got a maximum at x = 500

The side y = ( 1000 - x ) / 2

y = 500/ 2

y = 250 yd

A(max) = 250 * 500

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2 years ago

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den301095 [7]

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2 years ago

Cayenne bought 20 pencils for 1.60 dollars at that rate how much would 35 pencils cost ​

Cayenne bought 20 pencils for 1.60 dollars at that rate how much would 35 pencils cost