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crimeas [40]
3 years ago
8

How do you do this I have no idea

Mathematics
1 answer:
sveta [45]3 years ago
6 0

Answer:

A

Step-by-step explanation:

Eliminate B C and D

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The following price reductions are available
Juli2301 [7.4K]
Let's use 50 cents as the price of the item
Two for the price of one = $.50 for two (or $.25 each)
Three for the price of two = $1.00 for 3 or  approximately $.33 each
Buy one get 25% off the 2nd means $.50 + (.125 which is 25% of $.50) for a total of $.625 or about $.63 ($.315 or about $.32 each)
Buy Two get 50% off the 2nd means $.50 for the first and $.25 for the 2nd for a total of $.75 or $.375 - about $.38 each

We can see that two for the price of one is the best value since you save $.25 off of $.50 (that's half)  and that buy two get 50% off the 2nd is the smallest price reduction since the $.50 item only goes down to $.38 or twelve cents off.
This would work no matter what the cost of the item. The savings would still be in the same proportions.
4 0
3 years ago
Find the dimensions of the rectangle of maximum area with sides parallel to the coordinate axes that can be inscribed in the ell
Volgvan

Answer:

The answer is below

Step-by-step explanation:

Find the dimensions of the rectangle of maximum area with sides parallel to the coordinate axes that can be inscribed in the ellipse 4x² + 16y² = 16

Solution:

Given that the ellipse has the equation: 4x² + 16y² = 16

let us make x the subject of the formula, hence:

4x² + 16y² = 16

4x² = 16 - 16y²

Dividing through by 4:

x² = (16 - 16y²)/4

x² = 4 - 4y²

Taking square root of both sides:

x=\sqrt{4-4y^2 }\\

The points of the rectangle vertices is at (x,y), (-x,y), (x,-y), (-x,-y). Hence the rectangle has length and width of 2x and 2y.

The area of a rectangle inscribed inside an ellipse is given by:

Area (A) = 4xy

A = 4xy

A=4(\sqrt{4-4y^2} )y\\\\A=4y\sqrt{4-4y^2}=4\sqrt{4y^2-4y^4}  \\\\The\ maximum\ area\ of\ the\ rectangle\ is\ at\ \frac{dA}{dy}=0\\\\  \frac{dA}{dy}=4(\frac{4-8y^2}{\sqrt{4-4y^2} } )\\\\4(\frac{4-8y^2}{\sqrt{4-4y^2} } )=0\\\\4-8y^2=0\\\\8y^2=4\\\\y^2=1/2\\\\y=\frac{1}{\sqrt{2} }\\\\x=\sqrt{4-4(\frac{1}{\sqrt{2} })^2}=\sqrt{2}

Therefore the length = 2x = 2√2, the width = 2y = 2/√2

7 0
3 years ago
What is m = -8; (-2, 16) in slope intercept form? :)
zimovet [89]

Answer:

y = -8x

Step-by-step explanation:

First let's look at what slope-intercept form is.

y = mx + b

m is the slope, which in this case is -8.

b is the y-intercept, which we will find later.

Now that we have identified the parts of the equation, let's plug in what we know. Use the point given for your x and y values.

y = mx + b

16 = -8(-2) + b

Let's simplify this to find b.

[multiply] 16 = 16 + b

[subtract 16] 0 = b

We now have our b-value, which is also our y-intercept. Plug in this value into the standard slope-intercept equation.

y = -8x

This is your equation.

Check this by plugging in the point again.

16 = -8(-2)

[multiply] 16 = 16

This expression is true; therefore, your answer is correct.

Hope this helps!

7 0
3 years ago
Read 2 more answers
Convert the rate of $480/day to the equialent rate in dollars/hour.
RUDIKE [14]

Answer:

It would be $20 per each hour

Step-by-step explanation:

Divide  480  by  24 .

5 0
3 years ago
Read 2 more answers
A mason wants to start building a stone pyramid the base of which has 551 blocks and the top 26th layer has only 1. If the numbe
nika2105 [10]
551 Blocks, 26 Layers. 551 divide by 26= 31 blocks per layer
6 0
4 years ago
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