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horsena [70]
3 years ago
8

What is a algebraic expression

Mathematics
2 answers:
alexgriva [62]3 years ago
8 0

Answer: An algebraic expression is a mathematical phrase that can contain numbers and/or variables.

Step-by-step explanation:

Zarrin [17]3 years ago
4 0

Answer:

Algebraic expression is an expression built up from integer constants, variables, and the algebraic operations

Step-by-step explanation:

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The city of Madison regularly checks the quality of water at swimming beaches located on area lakes. Fifteen times the concentra
Maksim231197 [3]

Answer:

The sample standard deviation is 393.99

Step-by-step explanation:

The standard deviation of a sample can be calculated using the following formula:

s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }

Where:

s= Sample standart deviation

N= Number of observations in the sample

{\displaystyle \textstyle {\bar {x}}}= Mean value of the sample

and \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} } simbolizes the addition of the square of the difference between each observation and the mean value of the sample.

Let's start calculating the mean value:

\bar {x}=\frac{1}{N}  \sum_{i=1}^{N}x_{i}

\bar {x}=\frac{1}{15}*(180+1600+90+140+50+260+400+90+380+110+10+60+20+340+80)

\bar {x}=\frac{1}{15}*(3810)

\bar {x}=254

Now, let's calculate the summation:

\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=(180-254)^2+(1600-254)^2+(90-254)^2+...+(80-254)^2

\sum_{i=1}^{N}(x_{i}-\bar {x}) ^{2} }=2173160

So, now we can calculate the standart deviation:

s=\sqrt[ ]{\frac{1}{N-1} \sum_{i=1}^{N}(x_{i}-{\displaystyle \textstyle {\bar {x}}}) ^{2} }

s=\sqrt[ ]{\frac{1}{15-1}*(2173160)}

s=\sqrt[ ]{\frac{2173160}{14}}

s=393.99

The sample standard deviation is 393.99

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3 years ago
PLS ANSWER FAST WILL GIVE BRANLIEST
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Step-by-step explanation:

1-(-1^2)+(-1^3) = 1-1+(-1)= -1

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Analyze the statements below and complete the instructions that follow.
masha68 [24]

Answer c

Step-by-step explanation:

7 0
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Please help me find m<1 before 11:59 PM!
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Answer:

129 degrees

Step-by-step explanation:

add the interior angles: 62 + 67 = 129

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