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2 years ago

9

Vasily is flying his first solo trip. His plan is to fly round trip, 2368 miles. His flight plan factors in the wind speed of 20

miles per hour and expects that he will complete the flight in 7 hours. At what speed is Vasily flying in still air?

1 answer:

telo118 [61]2 years ago

3 0

What's the question? HMmmmmmmm

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polet [3.4K]

Answer:

(-5,-28)

Step-by-step explanation:

Given

$f(x)=x^2+10x - 3$

Required

Find the coordinates of the vertex

Given that the function is a quadratic function;

The general form of a quadratic function is

$f(x)= ax^2+bx +c$

By comparison;

$a = 1\ b = 10\ and\ c = -10$

To calculate the coordinates of the vertex;

we start by calculating the x-coordinate;

$x = \frac{-b}{2a}$

Substitute 10 for b and 1 for a

$x = \frac{-10}{2*1}$

$x = \frac{-10}{2}$

$x = -5$

Substitute $x = -5$ in the given function;

$y=x^2+10x - 3$

$y=(-5)^2+10*-5 - 3$

$y=25-50 - 3$

$y=-28$

<em>Hence, the coordinates of the vertex is (-5,-28)</em>

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KiRa [710]

Answer:

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Step-by-step explanation:

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konstantin123 [22]

It seems like you've begun to apply the grouping method.

Because the two binomials in the parentheses are the same, we can rewrite this as

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