12w=-8(-4w=10) please help

Answer:

Answer:

The answer is B.50

Step-by-step explanation

Replace x with 50

Answer:

4

Step-by-step explanation:

Answer:

a = 4

Step-by-step explanation:

5a - 15 + 9a = 3a + 29

14a - 15 = 3a + 29

11a - 15 = 29

11a = 44

a = 4

Answer: 4

Step-by-step explanation: Subtract 10 from each sides and divide both sides by -2

Answer:

ist cubes man

Step-by-step explanation:

Question: A trucking company operates in three regions of the country. The table below depicts the probability that each  company truck is in the region and the fuel prices per gallon. What amount should the company budget on average  for a gallon of fuel across its operations? Round your answer to the nearest cent.

Answer:

A. $3.53

B. $3.55

C. $3.68

D. $3.70

The amount that the company should put on average for a gallon across the operations is $ 3.70. This option D is correct.

The company of trucks runs operations in several countries as per the table each region has distinct scores of probability and as the company that is farthest from the market has more wages as compared to that is the nearest

The percentage is 100 and probability counts as compared to one. Thus 50% is 0.50. If assuming X is the cost of fuel then using the formula we get.

[tex]Mean = E (X) = f(xi) xi[/tex]

E(X) = 3.10 x 0.2 +3.5 x 0.3 +4.05 x 0.5 = 3.69 that is 3.70 dollars.

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The complete question is :

A trucking company operates in three regions of the country. The table below depicts the probability that each  company truck is in the region and the fuel prices per gallon. What amount should the company budget on average  for a gallon of fuel across its operations? Round your answer to the nearest cent.

A. $3.53

B. $3.55

C. $3.68

D. $3.70

Answer:

(48b 2) 3

Step-by-step explanation:

The answer is  A) The simplified expression is a polynomial. & B)The simplified expression has a constant term.

Polynomials are sums of phrases of the form okay⋅xⁿ, where ok is any range and n is an effective integer. as an instance, 3x+2x-5 is a polynomial. Introduction to polynomials. This video covers commonplace terminology like phrases, diploma, fashionable form, monomial, binomial and trinomial.

Here, we have,

A polynomial is described as an expression that consists of variables, constants, and exponents, which can be mixed with the usage of mathematical operations including addition, subtraction, multiplication, and department (No department operation by way of a variable).

t³(8 + 9t) - (t² + 4)(2 - 3t)

=   8t³ + 9t⁴ - (2t² - 3t³ + 8 - 12t)

=   8t³ + 9t⁴ - 2t² + 3t³ - 8 + 12t

=   9t⁴ + 11t³ - 2t² + 12t - 8.

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complete question;

T^3(8 + 9t) - (t2 + 4) (2 – 3t)

The simplified expression is a polynomial.

The simplified expression has a constant term.

The simplified expression is cubic.

The simplified expression has four terms.

The simplified expression is a trinomial

Answer:

0.857

Step-by-step explanation:

Given that :

Every seventh person gets a free box of popcorn ; then not getting a free box of popcorn means you're not the 7th person inline.

However, since the order of arrangement is unknown, but one person out of every 7 gets ;

Probability of getting a popcorn is hence ;

p(getting popcorn) = 1/7

Probability of not getting will then be its complement :

1 - (1/7) = 6/7 = 0.857

Blank 1 = same slope

Blank 2 = negative reciprocals

Answer:

I had the same question and guessed but i got 100% on it. The following snip is the answer

Step-by-step explanation:

The function g(x) has the largest maximum which is −1 option (C) is correct if the equation for the function f(x) is f(x)=−2|x−7|−4.

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

It is given that:

The function:

f(x) = -2|x - 7| - 4

Plug x = 1

f(1) = -16

Plug x = 2

f(2) = -14

Plug x = 3

f(3) = -12

Plug x = 4

f(3) = -10

From the table:

The function g(x) has the largest maximum which is −1.

Thus, function g(x) has the largest maximum which is −1 option (C) is correct if the equation for the function f(x) is f(x)=−2|x−7|−4.

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Answer:

Hi there!

Your answer is:

The length is 40

Step-by-step explanation:

W=4+6L

P=568

Perimeter formula

W+W+L+L=568

Plug in known values!

(4+6L)+(4+6L) + L +L = 568

Solve for L

14L + 8 = 568

-8

14L = 560

/14

L=40

Answer:

-12

Step-by-step explanation:

a(b - c)

b = 3, c = -3 and a = -2

-2( 3- -3)

-2(3+3)

-2(6)

-12

Answer: -12

Explanation: It's a good idea to get into the habit of

using parenthses when substituting numbers in for variables.

If you have parenthses in your original problem,

change them to brackets as you substitute to avoid confusion.

Since your brackets replace your original parenthses,

your first step will be to simplify what's inside the brackets.

So we have (-2) [(3) - (-3)].

Simplifying inside the brackets, we get 6.

So we have (-2) [(6)].

Multiplying from here, our answer is -12.

Step-by-step explanation:

8(15-4)

----------

4square - 5

= 8(15-4)

=120 - 32

= 88

4square - 5

=4×4 = 16

16 - 5

= 11

therefore,

88/11

= 8

Answer:

(a) The assumption regarding the distribution of the price of small computers which is necessary to test the analyst’s claim are;

(b) H0: μ ≥ 350; HA: μ < 350

(c) The value of the t-test statistic is -0.263.

(d) At a 5% significance level, the t table gives a critical value of -2.015 at 5 degrees of freedom for the left tailed test.

Step-by-step explanation:

We are given that an analyst comments that the larger companies have a cause for concern since the mean price of these small computers has fallen below $350.

She examines six popular brands of these small computers and records their retail prices as given below:

$322, $269, $373, $412, $299, $389.

(a) The assumption regarding the distribution of the price of small computers which is necessary to test the analyst’s claim are;

(b) Let [tex]\mu[/tex] = population mean price of these small computers

So, Null Hypothesis, [tex]H_0[/tex] : μ ≥ 350    {means that the mean price of these small computers is more than or equal to $350}

Alternate Hypothesis, [tex]H_A[/tex] : μ < 350    {means that the mean price of these small computers has fallen below $350}

(c) The test statistics that will be used here is one-sample t-test statistics because we don't know about the population standard deviation;

                          T.S. = [tex]\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }[/tex]  ~ [tex]t_n_-_1[/tex]

where, [tex]\bar X[/tex] = sample mean price = [tex]\frac{\sum X}{n}[/tex] = $344

            s = sample standard deviation = [tex]\sqrt{\frac{\sum(X-\bar X)^{2} }{n-1} }[/tex] = $55.89

            n = sample of prices = 6

So, the test statistics = [tex]\frac{344-350}{\frac{55.89}{\sqrt{6} } }[/tex]  ~ [tex]t_5[/tex]

                                 = -0.263

The value of the t-test statistic is -0.263.

(d) Now, at a 5% significance level, the t table gives a critical value of -2.015 at 5 degrees of freedom for the left tailed test.

Since the value of our test statistics is more than the critical value of t as -0.263 > -2.015, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region.

Therefore, we conclude that the mean price of these small computers is more than or equal to $350.

Step-by-step explanation:

z^7/z^-14=21

z^21=21

Answer:

3164.76

Step-by-step explanation:

divide the numbers.

and don't forget the decimal

Answer:

3164.76

Step-by-step explanation:

Hope this helps!

Step-by-step explanation:

2nd one I think.........?

Answer:

-x=y+w-k

-x.-1=-1.(y+w-k)

x=-y-w+k

Answer:

Follows are the solution to this question:

Step-by-step explanation:

Technician selects three out of 5 systems  

In C(5,3)=10ways, this can be achieved  

In part a:

Space sample chooses 3 of a 5 systems  

[tex](M_1, \ M_2,\ M_3),[/tex][tex](M_1,M_2,M_4) \ (M_1,M_2,M_5) \ (M_1,M_3,M_4) \ (M_1,M_3,M_5),[/tex][tex](M_1,M_4,M_5) \ (M_2,M_3,M_4)\ (M_2,M_3,M_5) \ (M_2,M_4,M_5),(M_3,M_4,M_5)}[/tex]

In point b:

A =MODULE WHICH INCLUDE M1 minimal amount of effort  

Outcomes probable =

[tex](M_1,M_2,M_3),\ (M_1,M_2,M_4) \ (M_1,M_2,M_5)\ (M_1,M_3,M_4)\\\\(M_1,M_3,M_5),\ (M_1,M_4,M)5)\ =\ 6[/tex]

[tex]\to p(A)=\frac{6}{10}\\\\[/tex]

            [tex]=0.6[/tex]

In point c:

B = highest effort that is [tex]M_5[/tex]

Potential result=

[tex](M_1,M_2,M_5) \ (M_1,M_3,M_5) \ (M_2,M_3,M_5)\(M_2,M_4,M_5) \\ (M_2,M_4,M_5), \ (M_3,M_4,M_5) \ =\ 6 \\\\[/tex]

[tex]\to B= \frac{6}{10} \\\\[/tex]

        [tex]=0.6[/tex]

[tex]\to P(B)=10[/tex]

In point d:

[tex]\to \ A \ intersection \ B=(M_1,M_2,M_5), \ (M_1,M_3,M_5) \ ,(M_1,M_4,M_5)[/tex]

[tex]\to A (A \ intersection \ B) = \frac{3}{10} \\\\\ \ \ \ \ \[/tex]

                                      [tex]=0.3[/tex]

In point e:

[tex]\to (A \cup B) = (M_1,M_2,M_3),\ (M_1,M_2,M_4)\ (M_1,M_2,M_5)(M_1,M_3,M_4)\ (M_1,M_3,M_5), \\ (M_1,M_4,M_5)\ (M_2,M_3,M_5) \ (M_2,M_4,M_5),(M_3,M_4,M_5) \ = \ 9[/tex][tex]\to P(A \cap B)=\frac{9}{10}[/tex]

                    [tex]= 0.9[/tex]

In point f:

[tex]\to (A\cap B) = \frac{3}{10}[/tex]

                 [tex]= 0.3[/tex]

In point g:

[tex]\to (A \cup B) = \frac{7}{10}[/tex]

                 [tex]=0.7[/tex]

In point h:

[tex]\to p(A \cap B) = 0.3 \neq 0[/tex]

Answer:

Follows are the answer to the given point.

Step-by-step explanation:

In point 1:

[tex]\to P( \text{number of response}) = \frac{192}{338} \\[/tex]

                                        [tex]= \frac{96}{169}\\\\= 0.56[/tex]

In point 2:

[tex]\to P| \text{(Zoloft and fill response)}| = \frac{27}{338}[/tex]

                                                 [tex]= 0.079[/tex]

In point 3:

[tex]\to P(\frac{\text{ full or partial}}{\text{St. John's Wort}}) = \frac{\frac{43}{338}}{\frac{113}{338}}[/tex]

                                [tex]= \frac{43}{338} \times \frac{338} {113}\\\\= \frac{43}{113}\\\\= 0.38[/tex]

In point 4:

[tex]\to P(\frac{\text{Placebo}}{\text{full or response}}) = P(\frac{(\text{Placebo} \cap \text{full or response})} {\text{p(full response)}})[/tex]

                               [tex]= \frac{\frac{79}{338}}{ 1- \frac{91}{338}} \\\\ = \frac{\frac{79}{338}}{ \frac{338-91}{338}} \\\\ = \frac{\frac{79}{338}}{\frac{247}{338}} \\\\ = \frac{79}{338} \times \frac {338}{247} \\\\= \frac{79}{274} \\\\ = 0.28[/tex]

Answer:

it's already in the simplest form

Yes... It is in the simplest form..

Answer:

x=33 and angle=69

Step-by-step explanation:

just got it on a test

Measure of x = 69 degree.

A triangle is a three sided polygon, which has three vertices and three angles which has the sum 180 degrees.

Given that,

vertex angle = 42 degree

Angle of base angle = (2x + 3)°

Use the knowledge that the sum of the base angles in an isosceles triangle equals 180° minus the vertex angle to find the value of x.

Thus,

Vertex angle is,

(2x + 3)° + (2x + 3)° = 180° - 42°

Base angle + Base angle = 180° - 4x + 6 = 138

4x = 132 x = 33

We substitute x = 33 into (2x + 3)°

To determine the magnitude of each base angle:

Base angle equals (x + 3)°

Base angle = (2 x 33 plus 3).

Angle at base: 69° As a result, each base angle is 69°.

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Answer:

7.3x10^-7

Step-by-step explanation:

you move the decimal to the right 7 times.

Hope this helps.

Answer:

[tex]10^-^5[/tex]  [tex]*73[/tex]

Step-by-step explanation:

So in 0.000073, 7 is the fifth digit in the term so we can write it as [tex]10^-^5[/tex] * 73

or 10 to power of negative 5 multiplied by 73.

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Mean (m) = 72

Standard deviation (sd) = 10

Grading cutoff policy:

bottom 5% receive F

next 15% receive D

next 35% receive C

next 30% receive B

A) Give the cutoffs for the grades in this course in terms of standardized scores.

Standardized score for grade cutoff:

Locating the Zscore for the proportions on the z table :

Bottom 5% = 0.05 ; corresponding Zscore = - 1.645

next 15% receive D = (5 +15)% 0.20 ; corresponding Zscore = - 0.84

next 35% receive C = (20+35)% = 0.55 ; corresponding Zscore = 0.13

next 30% receive B = (55 + 30)% = 0.85 ; Corresponding Zscore = 1.04

B) Give the cutoffs in terms of actual total scores.

Recall:

Zscore = (x - m) /sd ; where x = actual score

x = sd*z + m

For F:

10*(-1.645) + 72 = 55.55

For D:

10*(-0.84) + 72 = 63.6

For C:

10*(0.13) + 72 = 73.3

For B:

10*(1.04) + 72 = 82.4

C) Do you think that this method of assigning grades is a good one?

Yes, it is good in terms of expressing scores around the mean such that score below are negative and those above are positive. However, it is a little bit ambiguous.

Answer:

24

Step-by-step explanation:

Given the equation of the regression line :

y = - 20.3 + 0.489s

where ŷ is the predicted science score

s = IQ score

An actual science test score for a student is 52.6 with an IQ of 100.

Find and interpret the residual.

The predicted science test score for a student with an IQ of 100 is :

y = - 20.3 + 0.489(100)

y = - 20.3 + 48.9

y = 28.6

The residual = actual - predicted score

The residual = 52.6 - 28.6 = 24

Hence, the residual is 24 which is the error in prediction made about the actual score.

Answer:

−1.99; The regression line overpredicts the student's science test score.

Step-by-step explanation:

Answer:

23

Step-by-step explanation:

Do the steps in reverse.

-8 divided by -2 = 4

4 + 19 = 23

Your answer is 23

Hope I helped :)

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Answer:

The null hypothesis will not be rejected.

Step-by-step explanation:

The hypothesis for the test is:

H₀: There is no difference between the two population means, i.e. d = 0.

Hₐ: There is a significant difference between the two population means, i.e. d ≠ 0.

Consider the Excel output attached.

The mean of the differences is, [tex]\bar d=-2.75[/tex].

The standard deviation of the differences is, [tex]S_{d}=4.268[/tex].

Compute the test statistic as follows:

[tex]t=\frac{\bar d}{S_{d}/\sqrt{n}}=\frac{-2.75}{4.268/\sqrt{8}}=-1.82[/tex]

The degrees of freedom is, n - 1 = 7.

Compute the p-value as follows:

[tex]p-value=2\cdot P(t_{7}<-1.82)=0.112[/tex]

The decision rule is:

The null hypothesis will be rejected if the p-value of the test is less than the significance level.

p-value = 0.112 > α = 0.02.

The null hypothesis will not be rejected.