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(-x^3-x) +(6x^2+6x-7)=(−x
3
−x)+(6x
2
+6x−7)=

Answers

Answer 1
Answer:

Answer:

-x^3 + 6x^2 + 5x - 7

Step-by-step explanation:

(-x^3-x) +(6x^2+6x-7)    (Simplify by adding the like terms)

= -x^3 + 6x^2 +6x - x - 7    (Simplify)

= -x^3 + 6x^2 + 5x - 7
Answer 2
Answer:

Answer: -x+6x+x-7

The x is to the 3rd power and the 6 is to the second power. Hope this helps XD

Step-by-step explanation:

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HELP ASAP ROCKY!!! will get branliest.​
10 is equal or less than j + 5
The augmented matrix of a system of equations has been transformed to an equivalent matrix in​ row-echelon form. Using​ x, y, and z as​ variables, write the system of equations corresponding to the following matrix. If the system is​ consistent, solve it.left bracket Start 3 By 3 Matrix 1st Row 1st Column 1 2nd Column 2 3rd Column 2 2nd Row 1st Column 0 2nd Column 1 3rd Column negative 3 3rd Row 1st Column 0 2nd Column 0 3rd Column 1 EndMatrix Start 3 By 1 Table 1st Row 1st Column 4 2nd Row 1st Column 9 3rd Row 1st Column negative 2 EndTable right bracket1 2 20 1 −30 0 149−2Which of the following system of equations corresponds to the given​ matrix?A.x plus 2 y plus 2 zx+2y+2zequals=44y minus 3 zy−3zequals=99zequals=minus−22B.2 x plus 2 y2x+2yequals=44negative 3 y−3yequals=99zequals=minus−22C.2 x plus 2 y plus 4 z2x+2y+4zequals=1negative 3 y plus 9 z−3y+9zequals=1minus−zequals=1D.xequals=442 x plus y2x+yequals=992 x minus 3 y plus z2x−3y+zequals=minus−22Select the correct choice below and fill in any answer boxes in your choice.A.The solution set isStartSet nothing EndSet{}.​(Type an ordered​ triple.)B.The solution is the empty set.
Directions: Solve the multi-step equation showing your work!

Suppose an interval estimate for the population mean was 62.84 to 69.46. The population standard deviation was assumed to be 6.50, and a sample of 100 observations was used. The mean of the sample was: A. 56.34 B. 62.96 C. 6.62 D. 66.15

Answers

Answer: Option D.

Step-by-step explanation:

The given interval for population mean was 62.84 to 69.46.

The sample mean will be at the midpoint of the interval.

That is: (\left(62.84+69.46\right))/(2)=66.15.

Learn more: brainly.com/question/12049968

Answer:

\bar X = 69.46-3.31= 66.15

\bar X = 62.84+3.31= 66.15

Because the confidence interval is defined as (\bar X -ME, \bar X + ME)

The best option is : D. 66.15

Step-by-step explanation:

Previous concepts

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

\bar X represent the sample mean  (variable of interest)

\mu population mean

\sigma=6.50 represent the population standard deviation  

n=100 represent the sample size  

Assuming the X follows a normal distribution  

X \sim N(\mu, \sigma=6.5)

The sample mean \bar X is distributed on this way:

\bar X \sim N(\mu, (\sigma)/(√(n)))  

The confidence interval on this case is given by:

\bar X \pm z_(\alpha/2)(\sigma)/(√(n)) (1)

We have a confidence interval given (62.84, 69.46). W ecan find the margin of error for this interval with this:

ME= (69.46-62.84)/(2)=3.31

With the margin of error we can find the sample mean with this:

\bar X = 69.46-3.31= 66.15

\bar X = 62.84+3.31= 66.15

Because the confidence interval is defined as (\bar X -ME, \bar X + ME)

The best option is : D. 66.15

A plant cell has a length of 0.000085 meters. Which is this length written in scientific notation?

Answers

Answer: The answer would be 8.5 times 10^-5

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10  If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Answer:

8.5 x 10^-5

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10

. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Write the equation of the line that goes through the point (-4,7) and has a slope of -5.

Answers

Answer:

y= -5x-13

Step-by-step explanation:

start with the linear equation

y= mx+b

indentify what you already have.

x= -4 and y= 7 and m(slope)= -5

We are solving for b, so plug in what you have.

7= -5(-4)+b

Simplify.

7= 20+b

Subtract 20 on both sides.

-13= b

Rewrite your equation with the x and y values.

y= -5x-13

Look at the set of ordered pairs.{(4, 6), (−7,−15), (13, 15), (−21, 8), (?, ?)}

Which of the following could replace the missing ordered pair to make the set not a function?

(−2, 4)
(21, 9)
(−7, 15)
(6, 8)
(13,−15)

Answers

The ordered pair that could replace the missing ordered pair to make the set not a function is given as follows:

(−7, 15).

When does a set of ordered pairs represent a function?

A set of ordered pairs represents a function if every input (first component of the ordered pair) is associated with exactly one output (second component of the ordered pair). In other words, if no two ordered pairs in the set have the same first component but different second components.

Hence the ordered pair (-7,15) would make the relation not a function, as the set already has the ordered pair (-7,-15), in which the input 7 is already mapped to an output of -15, hence it cannot be mapped to an output of 15.

More can be learned about relations and functions at brainly.com/question/12463448

#SPJ1

Please help ASAP! Thank you!

Answers

Omg I need help ASAP TOO Twinzies

True or false is 6x10^5 is 20 times as much as 3x10^4

Answers

answer

TRUE

HOPE IT WILL HELP YOU
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