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weqwewe [10]
3 years ago
11

a coupon subtracts $5.16 from the price of a shirt. you pay $15.48 for the shirt after using the coupon. Write and solve an equa

tion to find the original price of the shirt
Mathematics
1 answer:
Inessa05 [86]3 years ago
5 0

P-5.16=15.48
P=15.48 + 5.16
Price original shirt =20.64

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The quadratic equation is given by:

y = 3x² + 10x - 8

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y = ax² + bx + c

Where a, b, c are constants

At point (4, 80):

80 = a(4)² + b(4) + c

16a + 4b + c = 80     (1)

At point (-3, -11):

-11 = a(-3)² + b(-3) + c

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At point (-1, -15):

-15 = a(-1)² + b(-1) + c

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Solving equations 1, 2 and 3 simultaneously gives:

a = 3, b = 10, c = -8

Therefore the quadratic equation becomes:

y = 3x² + 10x - 8

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2 years ago
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Norma-Jean [14]

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Step-by-step explanation:

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3 years ago
Is √6/8. rational or irrational?
Ipatiy [6.2K]
<h2>Answer:</h2>

<em>The number is </em><u><em>irrational</em></u><em>.</em>

<h2>Step-by-step explanation:</h2>

<h3>1. Convert to decimal.</h3>

\sqrt{\frac{6}{8} } =\sqrt{0.75} =0.8660254038...

<h3>2. Conclude.</h3>

<em>Since this number shows to have infinite decimal figures, it cannot be represented as the ratio of 2 integers. Hence, the number is </em><u><em>irrational</em></u><em>.</em>

<u><em>-------------------------------------------------------------------------------------------------------</em></u>

<em>Note.</em><em> In case the number expressed in the question was </em>\frac{\sqrt{6} }{8}, the answer  would still be <u><em>irrational</em></u><em>, for the same reasons explained above</em>.

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<em>Learn more about the classification of numbers here:</em>

<em>brainly.com/question/28292851</em>

<em>brainly.com/question/28292525</em>

<em>brainly.com/question/28281557</em>

<em>brainly.com/question/28262827</em>

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The sequence -6,-11,-16,-21,-26 is arithmetic .... True or false ?
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True

Step-by-step explanation:

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3 years ago
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