I really wish I knew

answer: f(x)= 3x^2-9x+3

Answer:

Polynomials in one variable are algebric rcpressions that consist of terms in the form axn a x n where n id a non-negayive(i.e positive or zero)integer and a is a real number and is called the coefgicient of the term.The degree of polynomial in ine variable is the largest exponent in the polynomial.

Step-by-step explanation:

The expression is 7x-2y-1.

If x=3, then you multiply 3 and 7.

7x3=21.

21-2y-1

If y=4, then you multiply 4 and 2.

4x2=8.

21-8-1

Then you combine like terms.

21-9

So the answer is 11.

Hope it helps!

Answer:

8

Step-by-step explanation: Make sure to double-check and go in order !

Answer:

Step-by-step explanation: 834^2n>4n

Answer:

Step-by-step explanation:

It is 7.3

Answer:

The expected value of the total sales projection is $24,773.

Step-by-step explanation:

Let sales be A,B and C respectively for each outcome.

Total Sales = A + B + C

E(Total Sales) = E(A + B + C)  

We know that A, B and C are three mutually exclusive events as they all cannot be true at a given point time

E(Total Sales) = E(A) + E(B) + E(C)

= 0.3*285*32 + 0.4*490*47 + 0.3*750*57

= $24,773

Therefore, expected value of the total sales projection is $24,773.

Answer:

she forgot to Putin a 0 for example

36,042

*correct data set given: 8, 8, 8, 16, 16, 16, 32, 32, 32, 32, 32, 32, 64, 64, 64, 64, 64, 64, 64, 80, 80, 80, 80, 88, 88, 88.

Answer:

See attachment

Step-by-step explanation:

To create a dot plot, first, prepare a tally for the given data set as follows:

Ounces of water => frequency

8 => 3

16 => 3

32 => 6

64 => 7

80 => 4

88 => 3

Next is to draw a scaled horizontal line. This will indicating the number of ounces of water each student drank. The frequency for each will determine how many dot to be plotted against each amount of ounces represented.

A simple dot plot has been created and attached below. Each dot represents the amount of water, in ounces, drank by each of the 26 students.

Answer:

See Explanation

Step-by-step explanation:

The data give is for 25 students not 26 as stated in the question

First, we need to plot the frequency table:

This is done as follows:

Ounces of Water ----- Frequency

8  ----------------------------- 3

16 ----------------------------- 3

32 ---------------------------- 6

64 ---------------------------  7

80 ----------------------------- 3

88 ----------------------------- 3

Next, we can now plot the dot plot using an interval of 8 on the x axis

(See Attachment)

Answer:

factoring: x=3 discriminant: 1089

Step-by-step explanation:

Let's solve your equation step-by-step.

6x2−x−40=5+2x

Answer:

x = 8

Step-by-step explanation:

Step 1: Write equation

5x - 11 = 3x + 5

Step 2: Solve for x

Subtract 3x on both sides: 2x - 11 = 5

Add 11 to both sides: 2x = 16

Divide both sides by 2: x = 8

Step 3: Check

Plug in x to verify it is a solution.

5(8) - 11 = 3(8) + 5

40 - 11 = 24 + 5

29 = 29

Answer: 500 + 100d

Step-by-step explanation:

trust, cmon g

Answer:

500+100(x)

Step-by-step explanation:

i not 100% sure, but i hope this helps

Answer:

5

Step-by-step explanation:

x + 2x + 6+x = 26

2x + 2x = 26 - 6

4x = 20

x = [tex]\frac{20}{4}[/tex]

∴ x = 5.

Answer:

O= 0.6             E= 0.15             H= 0.25

E= 0.4              A= 0.024          N= 0.75

V= 0.58           Y= 174               R= 0.8

E= 17.1              E= 1.74              T= 0.008

S= 19.9            

Step-by-step explanation:

EVERYONE  _HATES

there is no 0.45 so a missing letter

Answer: 850ml

Step-by-step explanation:

IL = 1 000ml

1/4 × 100

= 850ml

Answer: it 1/2

Step-by-step explanation: i got the answer on test!!!

Answer:

12 pints

Step-by-step explanation:

Answer:

2x + 2

Step-by-step explanation:

robert equals x

Answer:

it would have to be 2x+2 to get ur x for robett

Answer:

a) Coefficient of Variation for Height = 4.46%

b) Coefficient of Variation for Ages

= 12.26%

c)Comparing both Variations, the coefficient of variation for ages is larger than that of the mean and this is due to the fact that the

Step-by-step explanation:

Coefficient of Variation formula = Standard deviation / Mean × 100%

From the attached diagram, we are given sample data

1) For the Height

a) Mean of the Heights

= Sum of term/ Number of terms

= 74 + 70 + 70 + 76 + 77 + 72 + 75+ 70 + 70 + 80 + 75 + 75/12

= 884/12

= 73.66666667

b) Standard Deviation of Heights

For Sample data, the formula

=√ (X - Mean)²/n - 1

= 3.284490644

c) Coefficient of variation for Heights

Coefficient of Variation formula = Standard deviation / Mean × 100%

=( 3.284490644/73.66666667) × 100

= 0.04458584584 × 100

= 4.45858458441%

≈ 4.46%

2) Mean of ages

= Sum of terms/ Number of terms

= 21 + 26 + 22 + 27 + 29 + 26 + 27 + 29 + 30 + 31 + 31 + 31/12

= 330/12

= 27.5

b)Standard Deviation of Ages

For Sample data, the formula

=√ (X - Mean)²/n - 1

= √ (21 - 27.5)² + (26- 27.5)² +( 22- 27.5)² + (27- 27.5)² + (29- 27.5)² +( 26- 27.5)² +( 27- 27.5)² + (29- 27.5)² + (30 - 27.5)² + (31- 27.5)² + (31- 27.5)²+ (31- 27.5)²/12

=√ -6.5² + -1.5² + -5.5²+ -0.5² + 1.5² + -1.5² + -0.5² + 1.5² + 2.5² +3.5² + 3.5² + 3.5²/ 11

= √125/11

= √11.36363636

= 3.370999312

c) Coefficient of Variation

= Coefficient of Variation formula = Standard deviation / Mean × 100%

= (3.370999312/27.5) × 100

= 0.12258179316 × 100

= 12.258179316%

It should be noted that the coefficient of variation for height will be 4.46%.

The Coefficient of Variation formula will be:

= Standard deviation / Mean × 100%

The mean of the heights will be:

= Sum of term/ Number of terms

= 74 + 70 + 70 + 76 + 77 + 72 + 75+ 70 + 70 + 80 + 75 + 75/12

= 884/12

= 73.7

The standard deviation of heights is 3.28. Therefore, the coefficient of variation for heights will be:

= ( 3.28/73.7) × 100

= 4.46%

The mean of ages will be:

= 21 + 26 + 22 + 27 + 29 + 26 + 27 + 29 + 30 + 31 + 31 + 31/12

= 330/12

= 27.5

The standard deviation of ages is 3.37. Therefore, the coefficient of variation will be:

= (3.37/27.5) × 100

= 0.123 × 100

= 12.3%

In conclusion, the coefficient of variation for ages is larger than that of the mean.

Learn more about coefficient of variation on:

https://brainly.com/question/12327871

Answer:

Therefore, x = 23°, ∠LKM = 56° and ∠MKN = 89° .

Step-by-step explanation:

Given that ∠LKN is 145° so we can assume that ∠LKM addes together with ∠MKN will get 145° in terms of x :

[tex]∠lkn = ∠lkm + ∠mkn = 145[/tex]

[tex]2x + 10 + 4x - 3 = 145[/tex]

[tex]6x + 7 = 145[/tex]

[tex]6x = 145 - 7[/tex]

[tex]6x = 138[/tex]

[tex]x = 138 \div 6 = 23[/tex]

Next, we have to substitute x = 23° into the expressions of ∠LKM and ∠MKN :

[tex]∠lkm = 2(23) + 10 = 56[/tex]

[tex]∠mkn = 4(23) - 3 = 89[/tex]

Answe 6-6

Step-by-step explanation: i hade 6 point and i lost 6 points hint 6-6

Answer:

-6 :(

Step-by-step explanation:

Answer:

38.0067567568 hours

Step-by-step explanation:

Answer:

r>3/2

Step-by-step explanation:

Hope this helps!!

Answer: 8

Step-by-step explanation:

Answer:

60

Step-by-step explanation:

The multiples of 15 are : 15, 30, 45, 60, 75, 90, .... 60 is a common multiple (a multiple of both 12 and 15), and there are no lower common multiples. Therefore, the lowest common multiple of 12 and 15 is 60.

Answer:

the LCM is 60

Step-by-step explanation:

Answer:

for C i would say its 2

Step-by-step explanation:

Answer:

x2 - 11x = -30

Step-by-step explanation:

x^2 - 11x = -30

add 30 to the left to make it = to zero

x^2 - 11x + 30 = 0

factor

(x-5)(x-6) = 0

check by FOIL

x times x = x^2

x times -6 = -6x

x times -5 = -5x

-6 + -5 = 11x

-5 times -6 = 30

Answer:

The reciprocal of 710 is simply 107

Step-by-step explanation:

The reciprocal means flip the top and bottom. The reciprocal of 710 is simply 107 .

Answer:

the answer is The reciprocal of 710 is 107

Step-by-step explanation:

Answer:

The  confidence interval for 90% confidence would be narrower than the 95% confidence

Step-by-step explanation:

From the question we are told that

  The  sample size is n = 41

For a 95% confidence the level of significance is  [tex]\alpha = [100 - 95]\% = 0.05[/tex] and

the critical value  of  [tex]\frac{\alpha }{2}[/tex]  is   [tex]Z_{\frac{\alpha }{2} } =Z_{\frac{0.05 }{2} }= 1.96[/tex]

For a 90% confidence the level of significance is  [tex]\alpha = [100 - 90]\% = 0.10[/tex] and

the critical value  of  [tex]\frac{\alpha }{2}[/tex]  is   [tex]Z_{\frac{\alpha }{2} } =Z_{\frac{0.10 }{2} }= 1.645[/tex]

So we see with decreasing confidence level the critical value  decrease

Now the margin of error is mathematically represented as

         [tex]E = Z_{\frac{\alpha }{2} } * \frac{s}{\sqrt{n} }[/tex]

given that other values are constant and only [tex]Z_{\frac{\alpha }{2} }[/tex] is varying we have that

         [tex]E\ \ \alpha \ \ Z_{\frac{\alpha }{2} }[/tex]

Hence for  reducing confidence level the margin of error will be reducing

  The  confidence interval is mathematically represented as

        [tex]\= x - E < \mu < \= x + E[/tex]

Now looking at the above formula and information that we have deduced so far we can infer that as the confidence level reduces , the critical value  reduces, the margin of error  reduces and the confidence interval becomes narrower

Using confidence interval concepts, according to the margin of error, the 90% confidence interval would be narrower than the 95% confidence interval.

The margin of error of a confidence interval is given by:

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

In which:

The higher the margin of error, the wider the interval is.

A similar problem is given at https://brainly.com/question/22966154