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Marrrta [24]
3 years ago
6

PLEASE HELP QUICK

Mathematics
1 answer:
Masteriza [31]3 years ago
5 0
F(x) = x^2 +2*7x + 40
.. = (x^2 +2*7x +7^2) +(40 -7^2)
.. = (x +7)^2 -9

f(x) = (x +7)² -9

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Use the four functions below for this question:
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Answer:

We have four functions:

For f(x) we have two points (-2,2) and (-1,-1)

we will use two point form which is:

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

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y-2=\frac{-1-2}{-1-(-2)}(x-(-2))

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y-4=-3(x-0)

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So, h(x)= -3x+4

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We will use (-2,6) and (2,22)  to find the function with two point form.

y-6=\frac{22-6}{2+2}x+2)

\Rightarrow y=4x+14

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To find the slope we will compare the given function with general equation which is y= mx +c; m is the slope

And to find y-intercept we will put x=0

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And y-intercept is: (0,-4)

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Slope is: 3

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skelet666 [1.2K]

Answer:

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3 years ago
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2. Flying to Kampala with a tailwind a plane averaged 158 km/h . On the return trip the plane only averaged 112 km/h while flyin
stiv31 [10]

Answer:

Speed of plane in still air = 135 km/h

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Step-by-step explanation:

Given that:

Speed of plane with the wind = 158km/h

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Let,

x be the speed of plane

y be the speed of wind

According to given statement;

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y = 158-135

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Hence,

Speed of plane in still air = 135 km/h

Speed of wind = 23 km/h

8 0
3 years ago
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