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2 years ago

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Peaches are being sold for $2 per pound.The customer created a model to represent the total cost of peaches bought. If x represe

nts the number of pounds of peaches bought and y represents the total cost of the peaches, which best describes the values of x and y?
The values of both x and y can be any real number.
The values of both x and y will be real numbers greater than or equal to 0.
The value of x and y will always be zero
The value of x can be any real number greater than or equal to 0, but the value of y must be an integer greater than or equal to 0.

2 answers:

Leya [2.2K]2 years ago

8 0

Answer:

The value of x can be any real number greater than or equal to 0, but the value of y must be an integer greater than or equal to 0.

Step-by-step explanation:

photoshop1234 [79]2 years ago

8 0

Answer:

D

Step-by-step explanation:

took the test (edge2020)

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Step-by-step explanation:

Given

$\frac{1}{2x} = \frac{r - x}{7}$

Required

Find all product of real values that satisfy the equation

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Cross multiply:

$2x(r - x) = 7 * 1$

$2xr - 2x^2 = 7$

Subtract 7 from both sides

$2xr - 2x^2 -7= 7 -7$

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Reorder

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Multiply through by -1

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(1) No real roots:

This possibility does not apply in this case as such, would not be considered.

(2) One real root

This is true if

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For a quadratic equation

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Add 56 to both sides

$4r^2 - 56 + 56= 0 + 56$

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Take square roots

$\sqrt{r^2} = \±\sqrt{14$

$r = \±\sqrt{14$

Hence, the possible values of r are:

$\sqrt{14$ or $-\sqrt{14$

and the product is:

$Product = \sqrt{14} * -\sqrt{14}$

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