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3 years ago

I really don't understand my teacher , can anyone here help me out please

Mathematics

2 answers:

Lana71 [14]3 years ago

8 0

56 that's what I got

zzz [600]3 years ago

6 0

56 is what I got.

Hope this helps

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Find the distance between each pair of parallel lines with the guven equation y=2x+7 y=2x-3

Doss [256]

Answer:

Step-by-step explanation:

The y-intercept for each line is...

y=2x+7 (0, 7)

y=2x-3 (0, -3)

Note this is because...

y=mx+b

b represents the y-intercept

Using the distance formula...

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2$

$d=\sqrt{(0-0)^2+(7-(-3))^2$

$d=\sqrt{0+(10)^2$

$d=\sqrt{0+100}$

$d=\sqrt{100}$

$d=10$

4 0

1 year ago

The answer to this word problem usinf discriminant

solniwko [45]

$\bf h=-9.8t^2+45t+1.2\implies 64.5=-9.8t^2+45t+1.2
\\\\\\
0=-9.8t^2+45t-63.3\\\\
-------------------------------$

$\bf \qquad \qquad \qquad \textit{discriminant of a quadratic}
\\\\\\
0=\stackrel{\stackrel{a}{\downarrow }}{-9.8}t^2\stackrel{\stackrel{b}{\downarrow }}{+45}t\stackrel{\stackrel{c}{\downarrow }}{-63.3}
~~~~~~
\stackrel{discriminant}{b^2-4ac}=
\begin{cases}
0&\textit{one solution}\\
positive&\textit{two solutions}\\
negative&\textit{no solution}
\end{cases}
\\\\\\
(45)^2-4(-9.8)(-63.3)\implies -456.36$

the discriminant is a negative value, thus no solution for such quadratic, meaning if we use h=64.5 like we did, there's no "t" seconds at which point the ball hits the batting cage.

8 0

2 years ago

[50 POINTS] WILL MARK BRAINLIEST!!! Please solve the whole page with work!! It will be very much appreciated and I will heart th

Gre4nikov [31]

Answer:

wait, it only 25 points...

Step-by-step explanation:

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2 years ago

What is the volume of a sphere with a radius of 9.5 ft, rounded to the nearest tenth of a cubic foot?

DiKsa [7]

Answer:

V = 3591.4 ft³

Step-by-step explanation:

The formula for the volume of a sphere whose radius is given is

V = (4/3)πr³

Here we have V = (4/3)(3.14)(9.5 ft)³, or:

V = 3591.4 ft³

6 0

3 years ago

Determine the domain and range of the given function

Neporo4naja [7]

Answer:

List all of the solutions.

−

Step-by-step explanation:

3 0

2 years ago