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lianna [129]
1 year ago
12

If you spend $50 (including shipping) at an online store, you recieve a $10 gift card. You want to purchase CDs that cost $12 ea

ch. If shipping cost $5, write and solve an inequality to find the number of Cds you must to receive the giftcard.
Mathematics
1 answer:
Crazy boy [7]1 year ago
7 0

Four CDs must be bought to receive a gift card from an <em>online</em> store.

<h3>How to determine the least number of CDs to be bought to receive a gift card</h3>

The <em>total</em> costs are equal to the sum of the <em>shipping</em> cost and the total related to the number of <em>acquired</em> CDs (n). The number of gift cards (m) is equal to the total costs divided by <em>minimum spent</em> money, that is, $ 50. We need to solve the following inequation to find the minimum quantity of CDs:

(12 · n + 5)/50 > 1

12 · n + 5 > 50

12 · n > 45

n > 45/12

n > 3.75

Four CDs must be bought to receive a gift card from an <em>online</em> store.

To learn more on inequalities: brainly.com/question/20383699

#SPJ1

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Answer:

x=-345

Step-by-step explanation:

2.3+0.02\left(x+20\right)-4.8=-9

\mathrm{Multiply\:both\:sides\:by\:}100

2.3\cdot \:100+0.02\left(x+20\right)\cdot \:100-4.8\cdot \:100=-9\cdot \:100

230+2\left(x+20\right)-480=-900

\mathrm{Subtract\:}230-480\mathrm{\:from\:both\:sides}

230+2\left(x+20\right)-480-\left(230-480\right)=-900-\left(230-480\right)

2\left(x+20\right)=-650

\mathrm{Divide\:both\:sides\:by\:}2

\frac{2\left(x+20\right)}{2}=\frac{-650}{2}

x+20=-325

\mathrm{Subtract\:}20\mathrm{\:from\:both\:sides}

x+20-20=-325-20

\bold{x=-345}

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Step-by-step explanation:

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4x2 - 12x + 9 can be factored as (2x - 3)(2x - 3)<br><br> True<br><br> False
azamat

Answer:

(2 x - 3)^2 thus it's True

Step-by-step explanation:

Factor the following:

4 x^2 - 12 x + 9

Factor the quadratic 4 x^2 - 12 x + 9. The coefficient of x^2 is 4 and the constant term is 9. The product of 4 and 9 is 36. The factors of 36 which sum to -12 are -6 and -6. So 4 x^2 - 12 x + 9 = 4 x^2 - 6 x - 6 x + 9 = 2 x (2 x - 3) - 3 (2 x - 3):

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Factor 2 x - 3 from 2 x (2 x - 3) - 3 (2 x - 3):

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(2 x - 3) (2 x - 3) = (2 x - 3)^2:

Answer:  (2 x - 3)^2

6 0
3 years ago
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