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3 years ago

Find the greatest product using rational rational numbers with a sum of 20

1 answer:

8 0

Hello,

Let's be x and y the 2 numbers

x+y=20==>y=20-x
P(x)=x*y=x*(20-x)=20x-x²
Max(P(x))==>P'(x)=0= 20-2x==>2x=20==>x=10

A product is maximum is the 2 numbers are equals;

Numbers are 10 and 10 and product=100

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poizon [28]

Answer:

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Step-by-step explanation:

The area of Δ BDF is the area of the rectangle subtract the area of the 3 white triangles.

Since the area of the rectangle = 80 cm² and

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Area of Δ DEF = 0.5 × 10 × 4 = 20 cm²

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Thus

area of Δ BDF = 80 - (20 + 24 + 8) = 80 - 52 = 28 cm²

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Lois makes customised tee-shirts. She advertises and receives orders through her own website. She buys blank tee-shirts for $1 e

Kay [80]

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Profit = Selling price - cost price

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Suppose that a classmate asked you why (2x + 112 is not (4x² + 1). What is your response to this classmate?

aleksandr82 [10.1K]

The given expression is the square of a binomial, such that:

(2x + 1)^2 = 4x^2 + 4x + 1

Then the correct option is C.

<h3>Are the expressions equivalent?</h3>

We want to see if:

(2x + 1)^2

Is equivalent to (4x^2 + 1).

First, this is false, let's prove that.

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