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I am Lyosha [343]

3 years ago

11

Haruka hiked several kilometers in the morning. She hiked only 66 kilometers in the afternoon, which was 25\%25% less than she h

ad hiked in the morning.

1 answer:

Rasek [7]3 years ago

5 0

Answer:

He walked 8 km in the morning

Step-by-step explanation:

Do you want an explanation?

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F(x) = 4x^2 - 3x + 2kx + 1

dybincka [34]

$f(x)=4x^2-3x+2kx+1=4x^2+(2k-3)x+1\\\\a=4;\ b=2k-3;\ c=1\\\\function\ has\ two\ zeros\ when\ \Delta=b^2-4ac > 0\\\\\Delta=(2k-3)^2-4\cdot4\cdot1=4k^2-12k+9-16=4k^2-12k-7 > 0\\\\a_k=4;\ b_k=-12;\ c_k=-7\\\\\Delta_k=(-12)^2-4\cdot4\cdot(-7)=144+112=256\\\\k_1=\frac{-b_k-\sqrt{\Delta_k}}{2a_k};\ k_2=\frac{-b_k+\sqrt{\Delta_k}}{2a_k}$

$\sqrt{\Delta_k}=\sqrt{256}=16\\\\k_1=\frac{12-16}{2\cdot4}=\frac{-4}{8}=-\frac{1}{2};\ k_2=\frac{12+16}{2\cdot4}=\frac{28}{8}=\frac{7}{2}\\\\a_k=4 > 0\ (up\ parabola\ arms-see\ the\ picture)\\\\Answer:k\in(-\infty;-\frac{1}{2})\ \cup\ (\frac{7}{2};\ \infty)$

6 0

3 years ago

9,261.95 x 0.003= ?<br><br> Plzz help

IgorLugansk [536]

Answer:

27.78585

Step-by-step explanation:

4 0

3 years ago

Which equation is a linear function

guapka [62]

Answer:

It would be B. 5-3x

Step-by-step explanation:

This function had a constant rate of change and has a y int

7 0

3 years ago

Which equation represents a proportional relastionship that has a constant of proportionality equal to 4/5

enyata [817]

Answer:

y= 4/5x

Step-by-step explanation:

A proportional relationship has an equation of the form y = mx. It passes through the origin.

y= 4/5x is the only equation which is in this form.

6 0

3 years ago

1.6+x-3.2=-2+5.6 how to solve for x

DedPeter [7]

1.6+x-3.2=-2+5.6
simplify
-1.6+x=3.6
+1.6 both sides
x=5.2

3 0

3 years ago

Read 2 more answers