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3 years ago

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The Value of x in the system of equation at the right is -2 what is the value of a? use elimination to help you find the value.

ax + 4y = 6
2x - 4y = -16

1 answer:

sammy [17]3 years ago

7 0

2x-4y=-16
ax+4y=6 +
--------------------
2x+ax=-10; for x=-2,
2(-2)+a(-2)=-10
-2a=-10+4
a=-6/-2
a=3

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Step-by-step explanation:

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Hey there!

Okay let's get cracking :D

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I hope it helped!

<u>Please vote for me as Brainliest if there is a second answer!</u>

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Read 2 more answers

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Ierofanga [76]

Answer:

154.285

Step-by-step explanation:

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A country's population in 1994 was 182 million. In 2002 it was 186 million. Estimate the population in 2004 using the exponentia

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\begin{cases}
1994\impliedby \textit{year 0, starting point}\\
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\end{cases}\implies 182=ae^{k0}
\\\\\\
182=a\cdot e^0\implies 182=a\cdot 1\implies 182=a
\\\\\\
thus\qquad P=182e^{kt}\\\\
-------------------------------\\\\$

$\bf P=182e^{kt}\qquad 
\begin{cases}
2002\impliedby \textit{8 years later}\\
t=8\qquad P=186
\end{cases}\implies 186=182e^{k8}
\\\\\\
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\\\\\\
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