The answer is C: (3,3)
<span><span><span>x+<span>3y</span></span>=12</span>;<span><span><span>−<span>4x</span></span>+<span>3y</span></span>=<span>−3</span></span></span>Step: Solve<span><span>x+<span>3y</span></span>=12</span>for x:<span><span><span>x+<span>3y</span></span>+<span>−<span>3y</span></span></span>=<span>12+<span>−<span>3y</span></span></span></span>(Add -3y to both sides)<span>x=<span><span>−<span>3y</span></span>+12</span></span>Step: Substitute<span><span>−<span>3y</span></span>+12</span>forxin<span><span><span><span>−<span>4x</span></span>+<span>3y</span></span>=<span>−3</span></span>:</span><span><span><span>−<span>4x</span></span>+<span>3y</span></span>=<span>−3</span></span><span><span><span>−<span>4<span>(<span><span>−<span>3y</span></span>+12</span>)</span></span></span>+<span>3y</span></span>=<span>−3</span></span><span><span><span>15y</span>−48</span>=<span>−3</span></span>(Simplify both sides of the equation)<span><span><span><span>15y</span>−48</span>+48</span>=<span><span>−3</span>+48</span></span>(Add 48 to both sides)<span><span>15y</span>=45</span><span><span><span><span><span>15y</span>15</span></span></span>=<span><span><span>4515</span></span></span></span>(Divide both sides by 15)<span>y=3</span>Step: Substitute3foryin<span><span>x=<span><span>−<span>3y</span></span>+12</span></span>:</span><span>x=<span><span>−<span>3y</span></span>+12</span></span><span>x=<span><span><span>(<span>−3</span>)</span><span>(3)</span></span>+12</span></span><span>x=3</span><span>(Simplify both sides of the equation)</span>
<span>
</span>
<span>Hope this helps!</span>
<span>
</span>
I wish I could help you but I doing this so I can ask sum
Answer:
1.0217
Step-by-step explanation:
so u can just didvide 5.1085 and u should get 1.0217 andi fi am wronbg i would check just ikn case
Answer:
No solution
Step-by-step explanation:
There are no values of Z that makes this equation true.
Answer:
The 95% confidence interval for the true population mean dog weight is between 62.46 ounces and 71.54 ounces.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 67 - 4.54 = 62.46 ounches.
The upper end of the interval is the sample mean added to M. So it is 67 + 4.54 = 71.54 ounces.
The 95% confidence interval for the true population mean dog weight is between 62.46 ounces and 71.54 ounces.