Sams sweats sold68 pairs of sweat pants and 70 sweat shirts the next day how much did sam collect on the two items that day? describe the difference in the sales on the two days

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Ответ:

kledi72

24.07.2022

Mathematics

$-7.60,\ -4.47$

Step-by-step explanation:

Given

f(x)=-1.3x^2-15.7x-44.2

The solution of the standard quadratic equation ax^2+bx+c=0 has solution

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

Applying the above principle

$\Rightarrow x=\dfrac{15.7\pm\sqrt{(-15.7)^2-4(-1.3)(-44.2)}}{2(-1.3)}\\\\\Rightarrow x=\dfrac{15.7\pm\sqrt{246.49-229.84}}{-2.6}\\\\\Rightarrow x=\dfrac{15.7\pm \sqrt{16.65}}{-2.6}\\\\\Rightarrow x=\dfrac{15.7\pm 4.08}{-2.6}\\\\\Rightarrow x=-7.60,\ -4.47$

The zeroes of the equation are -7.60, -4.47.

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