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nataly862011 [7]
3 years ago
8

In September a clothing store had a sale where you could get 3 scarves for $13.35. In October the price was changed to 5 scarves

for $22.65. On which month did a scarf cost the most?
Mathematics
1 answer:
anyanavicka [17]3 years ago
4 0
In October because 22.65 times 5 Equal 113.25. and 13.35 times 3 equal 40.05
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Find the larger of the two roots of the equation y = -2.2x2 + 63.5x - 17
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The larger of the two roots of the equation y = -2.2x^2 + 63.5x - 17would be 28.59.

<h3>How to find the roots of a quadratic equation?</h3>

Suppose that the given quadratic equation is

ax^2 + bx + c = 0

Then its roots are given as:

x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}

The given quadratic equation is

y = -2.2x^2 + 63.5x - 17

now, the roots of the equation are

x = \dfrac{-63.5 \pm \sqrt{63.5^2 - 4(-2.2)(-17)}}{2(-2.2)}\\\\\\x = \dfrac{-63.5 \pm \sqrt{4032.25 - 149.6}}{(-4.4)}\\\\\\x = \dfrac{-63.5 \pm \sqrt{3882.65}}{(-4.4)}\\\\\\x = \dfrac{-63.5 \pm 62.31}{(-4.4)}

The two roots are 0.27 and 28.59.

Thus, the larger of the two roots of the equation y = -2.2x^2 + 63.5x - 17would be 28.59.

Learn more about finding the solutions of a quadratic equation here:

brainly.com/question/3358603

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7 0
2 years ago
Give the prime factorization of the number. use exponents when possible <br> 126
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Answer:

=2*3^2 *7

Step-by-step explanation:

Prime factorization means to simplify 126 down to prime numbers

126 = 2*63

     = 2* 9*7

     = 2*3*3*7

Since 2 3 and 7 are prime numbers, we rewrite these with exponents

     =2*3^2 *7

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That would be a census!
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