Graph the linear equation y= -3x using the slope and y intercept 7th grade middle school math pls answer fast this is due soon

Mathematics

1 answer:

ehidna [41]3 years ago

3 0

Answer: graph -3 on the y axis which is the line going straight up and down and then go up one, and then to the right one and graph that point. keep on going up one and to the right one.

Step-by-step explanation:

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Suppose that a jewelry store tracked the amount of emeralds they sold each week to more accurately estimate how many emeralds to

denpristay [2]

Answer: The point estimate for the mean is 2.59 and the margin of error is 0.13 .

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\mu\pm E$ , where E is the margin of error .

Given : At the end of one year, the store used the weekly sales information to construct a 95% confidence interval for the mean number of emeralds sold per week.

The confidence interval they calculated was (2.46,2.72) .

The lower limit of the confidence interval : $\mu-E=2.46$ (1)

The upper limit of the interval : $\mu+E=2.72$ (2)

Adding (1) and (2) , we get

$2\mu=5.18\\\\\Rightarrow\mu=2.59$

Now, Subtracting (1) from (2) , we get

$2E =0.26\\\\\Rightarrow\ E=0.13$

Hence, the point estimate for the mean is 2.59 and the margin of error is 0.13 .

7 0

3 years ago

What is the slope perpendicular to y=-3

liraira [26]

check the picture below.

so, y = -3 is simply a horizontal line, as you see there, and any perpendicular line to that will be a vertical one, whose slope is undefined.

we can check by simply picking two points off the red line hmmm say (-2,2) and (-2, -2)

$\bf (\stackrel{x_1}{-2}~,~\stackrel{y_1}{2})\qquad (\stackrel{x_2}{-2}~,~\stackrel{y_2}{-2}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{-2-2}{-2-(-2)}\implies \cfrac{-2-2}{-2+2}\implies \stackrel{und efined}{\cfrac{-4}{0}}$