if one run a speed of 10 feet per second and the other 8 feet per second I think it is 18 feet apart they will be because one run 10 feet and the other one run 8 so 10+8=18 feet apart from each other

7 0

4 years ago

What is the solution of the equation (x – 5)2 + 3(x – 5) + 9 = 0? Use u substitution and the quadratic formula to solve.

Sophie [7]

(x – 5)²<span> + 3(x – 5) + 9 = 0

x</span>² - 10x + 25 + 3x - 15 + 9 = 0

x² - 7x - 16 = 0

$x = \frac{7 + \sqrt{(-7)^2-4(1)(-16)} }{2}$ or $x = \frac{7 - \sqrt{(-7)^2-4(1)(-16)} }{2}$

$x = \frac{7 + 3i \sqrt{3} }{2}$ or $x = \frac{7 - 3i \sqrt{3} }{2}$

(Answer B)

7 0

3 years ago

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