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4 years ago

2) You can buy 3 apples at the Quick Market for $1.05. You can buy 5 of the

Mathematics

1 answer:

Alexus [3.1K]4 years ago

3 0

Answer:

Quick Market

Step-by-step explanation:

You need to set up the problem in fraction form or 3/1.05 and 5/1.15

Then you need for the numbers to have the same denominator.

After doing that the fraction would look like 114/39.9 for Quick Market and 173.48/39.9 for Stop and Save.

So Quick Market costs less.

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Mekhanik [1.2K]

Answer:

label a graph doing -5,-8, and 4,4 use the formula which is

d = ( x 2 − x 1 )^2 + ( y 2 − y 1 )^2

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so this is the same thing the person above me did but I've been typing this out so long I want to go ahead and submit anyway

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3 years ago

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Step-by-step explanation:

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3 years ago

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sammy [17]

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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3 years ago

You are situated 300 feet from the base of Tower Glitz Plaza watching an external elevator descend down the side of the building

nordsb [41]

Answer:

18.66 ft/s

Step-by-step explanation:

The distance between you and the elevator is given by:

$h=\sqrt{x^2+y^2}$

The rate of change for the distance between you and the elevator is given by:

$\frac{dh}{dt}=\frac{dh}{dy}*\frac{dy}{dt}$

$-16=\frac{dh}{dy}*\frac{dy}{dt}$

$\frac{dh}{dy}=\frac{d}{dy} (\sqrt{x^2+y^2})\\$

Applying the chain rule:

$u=x^2+y^2\\\frac{dh}{dy}=\frac{d\sqrt u}{du} *\frac{du}{dy}\\\frac{dh}{dy}=\frac{1}{2\sqrt u} *2y\\\frac{dh}{dy}=\frac{y}{\sqrt {(x^2+y^2)}}$

Therefore, at x=300 and y = 500, dy/dt is:

$-16=\frac{y}{\sqrt {(x^2+y^2)}}*\frac{dy}{dt}\\-16=\frac{500}{\sqrt {(300^2+500^2)}}*\frac{dy}{dt}\\\frac{dy}{dt}=-18.66\ ft/s$

The elevator is descending at 18.66 ft/s.

7 0

3 years ago