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zhuklara [117]
3 years ago
12

If you spend at least $50(including shipping) at an online store, you receive a $10 gift card. You want to purchase CDs that cos

t $12 each. If shipping costs $5, write and slice an inequality to find the number of CDs you must buy to receive the gift card.
Mathematics
2 answers:
Finger [1]3 years ago
4 0

Answer:

5 CD's

Step-by-step explanation:

5(#of CD)*12($ for each CD)=60+5 for shiping= 65-10(Gift card)= 55

It says at least 50 so you could not do 4 CD which would be less than $50 spent

Hope this helps :)

erastovalidia [21]3 years ago
4 0

Answer:

 

You must buy 4 CDs

Step-by-step explanation:

Let X be the number of CDs.

 

12X + 5 >= 50 <--- They cost $12 each, $5 for shipping. Must spend $50 or more

 

12X >= 45

 

X >= 45/12 = 15/4 = 3 and 3/4

 

You must buy 4 CDs

They will cost $12*4+5 = 48 + 5 =$ 53 including shipping.

Then you will be eligible for the $10 gift card for your next purchase.

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Answer:

Length, l=450 yards

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Step-by-step explanation:

Let the long side be x and since the length is twice the width, then the width is half of that length hence 0.5x. Since we only have three parts to fence as one long side doesn't require fencing, then the perimeter will be given by x+0.5x+0.5x=2x=900 yards

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In conclusion, the long side is 450 yards while short side is 225 yards.

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3 years ago
Find the following integral
ololo11 [35]

There's nothing preventing us from computing one integral at a time:

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Expand the integrand completely:

x(1-x)^2(2-x)^2 = x^5-6x^4+13x^3-12x^2+4x

Then

\displaystyle\frac14\int_0^1x(1-x)^2(2-x)^2\,\mathrm dx = \left(\frac16x^6-\frac65x^5+\frac{13}4x^4-4x^3+2x^2\right)\bigg|_{x=0}^{x=1} \\\\ = \boxed{\frac{13}{240}}

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