All categories

3 years ago

Show some work please or an explanation please. I'll give out brainlest. 3x + 5 = -x -7

Mathematics

2 answers:

Viefleur [7K]3 years ago

7 0

Step-by-step explanation:

3x+x=-7-5

4x=-12

x=-12/4

x=-3

Andre45 [30]3 years ago

5 0

Answer:

x=-3

Step-by-step explanation:

Add x to both sides.

3x+5+x=-7

Simplify 3x+5+x to 4x+5.

4x+5=-7

Subtract 5 from both sides.

4x=-7-5

Simplify -7-5 to−12.

4x=-12

Divide both sides by 4.

x=− 12/4

Simplify 12/4 to 3

You might be interested in

Round 5.9496 to the nearest thousandth

Evgesh-ka [11]

Answer:

5.95

Step-by-step explanation:

that is because 96 is rounded too 100

so its 5.9500 = 5.95

4 0

3 years ago

Read 2 more answers

How to find slope on a graph?

GalinKa [24]

Well you basically use rise/run so basically you choose two points on the line and you count how many squares it goes up until its on the same line as the other point and then you count how many squares to the side to get to the other point so rise/run ill explain it a lil better

8 0

3 years ago

URGENT 20 points describe the graph of the function g(x) =(-0.8 X) is related to the graph of the parent function. *

MAXImum [283]

Answer: G(x) is compressed horizontally and reflected over the y-axis

Step-by-step explanation:simple

8 0

3 years ago

A teacher was interested in knowing the amount of physical activity that his students were engaged in daily. He randomly sampled

klasskru [66]

Answer:

The standard error of the mean is 4.5.

Step-by-step explanation:

As we don't know the standard deviation of the population, we can estimate the standard error of the mean from the standard deviation of the sample as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}$

The sample is [30mins, 40 mins, 60 mins, 80 mins, 20 mins, 85 mins]. The size of the sample is n=6.

The mean of the sample is:

$\bar{x}=\frac{1}n} \sum x_i =\frac{30+40+60+80+20+85}{6}=52.5$

The standard deviation of the sample is calculated as:

$s=\sqrt{\frac{1}{n-1}\sum (x_i-\bar x)^2} \\\\ s=\sqrt{\frac{1}{5}\cdot ((30-52.5)^2+(40-52.5)^2+(60-52.5)^2+(80-52.5)^2+(20-52.5)^2+(85-52.5)^2}\\\\s=\sqrt{\frac{1}{5} *3587.5}=\sqrt{717.5}=26.8$

Then, we can calculate the standard error of the mean as:

$\sigma_{\bar{x}}\approx\frac{s}{\sqrt{n}}=\frac{26.8}{6}= 4.5$

6 0

3 years ago

hey, if y'all want any advice or help(ON ANYTHING), I'll always be here for you!! I like to help others out even when I need hel

Marina86 [1]

Answer:

I posted a question not too long ago, no one has answered yet and I'm almost done with the assignment, help would be greatly appreciated! :)

3 0

3 years ago