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3 years ago

true or false: we want the leading coeffient of a polynomial to be a positive number whenever possible

Mathematics

2 answers:

EastWind [94]3 years ago

4 0

That is false... coefficients in polynomials can lead in either positive or negative

levacccp [35]3 years ago

4 0

The leading coefficient should be positive whenever possible, true.

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Simplify the following expression 3^2/5 x 3^-7/5. I think it is 1/3. 3^-5/5

kobusy [5.1K]

Answer:

1/3

Step-by-step explanation:

3^2/5 x 3^-7/5

We know that a^b* a^c = a^(b+c)

3^(2/5 -7/5)

3^ (-5/5) = 3^ -1

We know that a^-b = 1/ a^b

3^-1 = 1 / 3

8 0

3 years ago

Find the value of x.

aleksandr82 [10.1K]

the sum of all interior angles in a polygon is

180( n - 2)

n = number of sides

now, this polygon is a quadrilateral, so it has 4 sides, so it's total is just 180( 4 - 2) = 360.

$360=x+4x+3x+2x\implies 360=10x\implies \cfrac{360}{10}=x\implies 36=x$

5 0

2 years ago

Read 2 more answers

Which number is a rational number?

nasty-shy [4]

Answer:

B. 2.6457513110...

and

C. 17.156

Step-by-step explanation:

A rational number is an integer, fraction, terminating decimal, or repeating decimal.

hope this helps!

brainliest appreciated:)

7 0

2 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=1%2F2x%5E3%20%2B%20x%20-7%20%3D%20-3%5Csqrt%7Bx%7D%20%20-1" id="TexFormula1" title="1/2x^3 + x

Margaret [11]

Answer:

none of the above

Step-by-step explanation:

The problem as written cannot have any of the solutions offered.

For any of those choices, the right side expression will be irrational. The left side expression will be rational for any rational value of x, so cannot be equal to the right-side expression.

The solution is an irrational number near ...

x ≈ 1.33682898582

5 0

3 years ago

The reacttimes data set has 50 observations of human reaction times to a physical stimulus. The reaction times are named times a

scoundrel [369]

Solution: The formula for mean is:

$Mean=\frac{\sum x}{n}$

Where:

$\sum x$ is the sum of given observations

$n$ is the number of observations

$\sum x=87.12$

$n=50$

$\therefore Mean =\frac{87.12}{50}= 1.74$ rounded to two decimal places

To find the median, we need to first arrange the data in ascending order but we are already given the data in ascending order.

Therefore, the median is:

$Median=\left(\frac{n+1}{2} \right)^{th} item$

$=\left(\frac{51}{2} \right)^{th} item$

$=25.5^{th} item$

$=1.52+0.5(1.54-1.52)$

$=1.52+0.01$

$=1.53$

Therefore, the median = 1.53

4 0

2 years ago