The train has travelled 45 miles the journey is double this length how long is the journey

Mathematics

1 answer:

Paraphin [41]3 years ago

6 0

Answer:

Step-by-step explanation:

Since the journey is DOUBLE 45, all you have to do is multiply 45 times 2

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Solving by elimination <br> -6x+6y=6 -6x+3y=-12

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So elimination method is basically adding the equations and canceling out variables.
-6x + 6y = 6
-6x + 3y = -12
The eaiest way to solve is by multiplying the bottom equation by -1.
-6x + 6y = 6
6x - 3y = 12
Now you add the eqautions.
3y = 18
Divde 3 from both sides.
y = 6
Now plug in 6 into any of the original two equations. Lets use the first one.
-6x + 6(6) = 6
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Subtract 36 from both sides.
-6x = -30
Divide -6 from both sides.
x = 5
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3 years ago

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The vertex of this parabola is at (-4, -1). When the y-value is 0, the x-value is 2. What is the coefficient of the squared term

satela [25.4K]

$\bf \qquad \textit{parabola vertex form}\\\\
\begin{array}{llll}
\boxed{y=a(x-{{ h}})^2+{{ k}}}\\\\
x=a(y-{{ k}})^2+{{ h}}
\end{array} \qquad\qquad vertex\ ({{ h}},{{ k}})\\\\
-------------------------------\\\\
y=a(x-(-4))^2-1\implies y=a(x+4)^2-1
\\\\\\
\textit{now, we also know that }
\begin{cases}
y=0\\
x=2
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s344n2d4d5 [400]

Answer:

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Step-by-step explanation:

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3 years ago

Find the value of X and y<br>

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Answer:

x=24cm

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Step-by-step explanation:

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