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3 years ago

What’s 4x + 3 = 2x + 23 ?

Mathematics

2 answers:

Grace [21]3 years ago

6 0

Combine like terms

4x+3=2x+23
-3. -3
4x=2x+20
-2x. -2x
2x=20
/2. /2
X=10

dsp733 years ago

4 0

Answer:

= 10

Hope this helps if so don't hesitate to 'Thanks' and/or 'brainliest' this answer!

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The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

blsea [12.9K]

Answer:

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

The data provided is:

X = {19, 19, 21, 25, 25, 28, 29, 30, 31, 32, 40}

Compute the mean of the data as follows:

$\bar x=\frac{1}{n}\sum\limits^{n}_{i=1}{x_{i}}$

$=\frac{1}{11}\times [19+19+21+...+40]\\\\=\frac{299}{11}\\\\=27.182$

Compute the standard deviation as follows:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$

$=\sqrt{\frac{1}{11-1}\times [(19-27.182)^{2}+(19-27.182)^{2}+...+(40-27.182)^{2}]}}\\\\=\sqrt{\frac{395.6364}{10}}\\\\=6.28996\\\\\approx 6.2899$

Thus, the standard deviation of the age distribution is 6.2899 years.

7 0

3 years ago

How to do 3/4.5-3/8.0

svet-max [94.6K]

7/24 I hope this helps you

7 0

3 years ago

FREE POINTS! Also will mark Brainliest for the most detailed explanation.

Alexxandr [17]

Answer:

209,000

Step-by-step explanation:

(500+200=700)

(700*300=210000)

210000-1000=209,000

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3 years ago

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The radius of the semicircle in the following composite figure is 8.5 millimeters. What is the total area of the composite figur

nydimaria [60]

Answer:

13.35 millimeter. (About)

Step-by-step explanation:

To find the area or circumference of any circle, you need to use pi. So, if we are trying to fine the area of a semicircle, you use the the formula:

πr²/2

So, if the radius is 8.5,

8.5 · 3.14 = 26.69

Now we divide it by 2.

26.69 = 13.345

Since the question is asking to round to the hundredths, the answer will be 13.35 millimeters.

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3 years ago

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The graph shows the prices of different numbers of bushels of corn at a store in the current year the table shows the prices of

kondaur [170]

A: to find rate of change you take the smallest rate:

2 bushels/$15 and divide both by 2 so that you get 1 bushel and $15/2=$7.5, therefor 1 bushel/$7.50.

B:The current year is at 2 bushels/$16 or 1 bushel/$8, which is $.50 more than the previous year.

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3 years ago

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