Can you please help with this question?

The model represents an equation. What value of X makes the equation true?
A) -15
B) -3
C) 15
D) 3

Answer:

Wouldn't it be 27 dollars?

Step-by-step explanation:

Answer:

Kindly check explanation

Step-by-step explanation:

Given the following :

Assume a normal distribution :

Mean (m) = 328

Standard deviation (sd) = 92

To obtain Zscore :

Zscore = (x - m) / sd

What is the probability that the cost will be more than $500?

x = $500

Zscore = (500 - 328) / 92 = 172 / 92 = 1.869 = 1.87

1 - p(Z < 1.87) = 1 - 0.9693 = 0.0307

b. What is the probability that the cost will be less than $250?

x = $250

Zscore = (250 - 328) / 92 = - 78 / 92 = - 0.8478 = - 0.85

p(Z < - 0.85) = 0.1977

c. What is the probability that the cost will be between $300 and $400?

x = 300

Zscore = (300 - 328) / 92 = - 28/ 92 = -0.30

p(Z < - 0.3) = 0.3821

x = 400

Zscore = (400 - 328) / 92 = 72/ 92 = 0.783

p(Z < 0.783) = 0.7823

0.7823 - 0.3821 = 0.4002

d. If the cost to a patient is in the lower 8% of charges for this medical service, what was the cost of this patient’s emergency room visit?

Probability is lower 8%

P (Z < Zscore) = 0.08

Zscore of 0.08 corresponds to - 1.41 on the z table

Zscore = (x - m) / sd

-1.41 = (x - 328) / 92

-129.72 = x - 328

-129.72 + 328 = x

x = 198.28

Answer:

c=4.95+3.99b

Step-by-step explanation:

When there are no books, the service fee still applies, so when b=0, c=$4.95.

For each book downloaded $3.99 is added to the charge. The service fee is only charged once a month.

c=4.95+3.99b

Answer:

The null hypothesis is  [tex]H_o : \sigma^2_1 = \sigma^2 _2[/tex]

The alternative  hypothesis is  [tex]H_a : \sigma^2_1 \ne \sigma^2 _2[/tex]

The conclusion is  

 There is no  sufficient evidence to conclude that there is a difference between the variances of salaries for seniors and managers

Step-by-step explanation:

From the question we are told that

   The variance for seniors is  [tex]s ^2_1 = 2.3[/tex]

   The variance for managers  is [tex]s ^2_2 = 11.3[/tex]

   The  first sample size is  [tex]n_1 = 25[/tex]

    The second sample size is  [tex]n_2 = 26[/tex]

    The significance level is  [tex]\alpha = 0.05[/tex]

The null hypothesis is  [tex]H_o : \sigma^2_1 = \sigma^2 _2[/tex]

The alternative  hypothesis is  [tex]H_a : \sigma^2_1 \ne \sigma^2 _2[/tex]

Generally the test statistics is mathematically represented as

      [tex]F = \frac{s_1^2}{s_2^2}[/tex]

=>    [tex]F = \frac{2.3}{11.3}[/tex]

=>    [tex]F = \frac{2.3}{11.3}[/tex]

=>    [tex]F = 0.2035[/tex]

Generally the p-value is obtain for the F-distribution table (Reference - Free statistic calculator ) at a degrees of freedom

          [tex]df_1 = 25 - 1[/tex]

          [tex]df_1 = 24[/tex]

and    [tex]df_2 = 26 - 1[/tex]

           [tex]df_2 = 25[/tex]

The p- value is  

        [tex]p-value = f_{0.2035,24,25} = 0.99989[/tex]

So from the calculation we see that

       [tex]p-value > \alpha[/tex]

So we fail to reject the null hypothesis

Answer:

-4+5/2 , 4+(-1)/2

1/2  ,  3/2

Answer:

When we round to the nearest hundred, we must look at the tens digit.

If the tens digit is 5 or lager, then we round up (we add 1 to the hundreds digit and after that, all the digits are zero.)

If the tens digit is smaller than 5, then we round down (the hundreds digit remains unchanged and after that, we complete with zeros.)

Then, the rounded number is 1900.

a) The greatest whole number that rounds to 1900 would be a number that is rounded down, then it will be:

1949

b) The least whole number that is rounded to 1900 is a number that we round up, this is:

1850

Largest: 1,949

This number is largest because it is closest to 1,900 without the number in the tens place being greater than 5, and the number in the tens place is bigger than 5

Smallest: 1,850

This number is smallest because any smaller number, like 1,849, would round to 1,800, and the number in the tens place is smaller than 5.

Have a good day!

Answer:

2x+2=58

2x=58-2=56

divide both sides by 2

x=28

Answer/Step-by-step explanation:

The 7 problems Calvin made mistakes in are as follows:

1. 76,450,000

We are moving the decimal point to our left by 7 decimal places. Therefore, the exponent of 10 should be 7 not 8.

The correct scientific notation = [tex] 7.645*10^7 [/tex]

2. 0.000327

We move the decimal point to our right by 4 decimal places. Since we are counting to our right, the exponent of 10 should be -4 not 4.

The correct scientific notation = [tex] 3.27*10^{-4} [/tex]

4. 116,000,000,000

Number of decimal places moved to our left = 11

The exponent of 10 should be 11 not 9.

The correct scientific notation = [tex] 1.16*10^11 [/tex]

5. 0.024

Number of decimal places moved to our right = 2

Since we are moving to our right, exponent of 10 = -2.

Calvin made a mistake here by not placing a decimal point in the first number after the last 0 to our right.

The correct scientific notation = [tex] 2.4*10^{-2} [/tex]

7. 100

There are just 2 zeros.

Therefore, the exponent of 10 = 2 not 3.

correct scientific notation = [tex] 10^2 [/tex]

9. 900,000

Number of decimal places moved to our left = 5

Since we are moving to the left, the exponent of 10 = 5 not -5

The correct scientific notation = [tex] 9*10^5 [/tex]

10. 0.00633

Number of decimal places moved to our right = 3

The exponent of 10 = -3

Calvin made a mistake by wrongly placing the decimal point.

The correct scientific notation = [tex] 6.33*10^{-3} [/tex]

You're charged $15 + $2 or $17 per session

If y = # of sessions,

$17y represents the total amount of dollars charged for y sessions

The total cost in dollars, of the class and mat for y sessions will be 17y. Then the correct option is C.

A relationship between two or more parameters that, when shown on a graph, produces a linear model. The degree of the variable will be one.

The linear equation is given as,

y = mx + c

Where m is the slope of the line and c is the y-intercept of the line.

The cost of a yoga class is $15 per session.

In addition, a mat fee of $2 is charged per session.

Then the total cost in dollars, of the class and mat for y sessions will be

C = 15y + 2y

C = 17y

Then the total cost in dollars, of the class and mat for y sessions will be 17y.

Then the correct option is C.

The complete question is attached below.

More about the linear equation link is given below.

https://brainly.com/question/11897796

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Answer:

5[tex]x^{2}[/tex]+49.193496x+105

Step-by-step explanation:

Answer:

Step-by-step explanation:

1. System A is consistent and independent and unique solution

2. System B: inconsistent and no solutions

3. System C: consistent and dependent and infinite many solutions

Answer:

x=9

Step-by-step explanation:

17x - 12 = 114 + 3x

First  Subtract 3x from both sides

14x - 12 = 114

Add 12 to both sides

14x=126

Divide by GCF (14)

x=9

Hope this helps! Plz award Brainliest : )

Answer:

17x - 12 = 114 + 3x

-3x +12 +12 -3x

Step-by-step explanation:

14x = 126

14/14 = 126/14 = 9

x = 9

Answer:

$7639.12

Step-by-step explanation:

We use the compound formula for accrued value (A) for a principal P deposited at an annual rate "r" over t years

[tex]A = P (1+r)^t[/tex]

In our case, with the given information, the formula becomes:

[tex]A = P (1+r)^t\\A=7500 \,(1.0023)^8\\A = 7639.11602[/tex]

which rounded to the nearest cent gives:  $7639.12

Hey there! I'm happy to help!

There is going to be a number 3 units to the right and 3 units to the left. If we go to the right, we add.

-1+3=2

And if we go to the left, we subtract.

-1-3=-4

So, the numbers that are more than 3 units from -1 on a number line is any number greater than 2 or less than -4.

Have a wonderful day! :D

Answer:

that would be 29 my friend

Step-by-step explanation:

29 plus 5 is 34

Answer:

624 pounds

Step-by-step explanation:

If 10 boxes of paper weigh 260 pounds, one box of paper is equal to 26 pounds because 260 divided by 10 is equal to 26. If one box equals 26 pounds, 24 boxes times 26 pounds each is equal to 624 pounds.

Answer:

Summed?

Step-by-step explanation:

it's the only word i could think of that's math related.

Answer:

Exact form= 67/9 Decimal form= 7.4

Step-by-step explanation:

Answer:

x= 67 /9

Step-by-step explanation:

5(x+2)−3=10+7(2x−10)

x= 67 /9

x= 67 /9

Hoped I helped

Answer:

Step-by-step explanation:

y + 6 = -2/3(x + 1)

y + 6= -2/3x - 2/3

y + 18/3 = -2/3x - 2/3

y = -2/3x - 20/3

Answer:

A

Step-by-step explanation:

Slope is positive 2 so we have to move 1 point right and 2 points up.

Secondly y-intercept is -6 so ,point is (0,-6)

Answer:

7^2 or 49

hope this helped

i think its 10

if not plz correct me

Answer:

0

Step-by-step explanation:

You distribute the 2 into the parenthesis, so 2•5x=10x and 2•4=8. So now you have 10x+8=8. You want to get the x alone so you have to bring the 8 on the left side to the ride and you do that by subtracting 8 in both sides. So 10x+8(-8)=8(-8). That turns into 10x=0 because 8-8=0. and now you want to leave the x alone so you divide by 10 so 10x/10=0/10 and so the 10x/10=x and 0 divided by anything is zero. Therefore, x=0

Answer: zero

Step-by-step explanation: anything multiplied by zero ALWAYS equals zero.

Answer:

0

Step-by-step explanation:

Anything times zero will equal zero!

Answer:

$6..99

Step-by-step explanation:

$6.99 each you do 44.45 - 9.50 than divide by 5

Answer:

[tex]u=-7[/tex]

Step-by-step explanation:

[tex]-2u-5=9[/tex]

Add 5 to both sides:

[tex]-2u-5+5=9+5[/tex]

[tex]-2u=14[/tex]

Divide both sides by -2:

[tex]\frac{-2u}{-2}=\frac{14}{-2}[/tex]

[tex]u=-7[/tex]

Answer:

B.   x-6

Step-by-step explanation:

The algebraic expression is x-6. Therefore, option B is the correct answer.

We need to find the algebraic expression for the phrase "six less than a number"

An algebraic expression (or) a variable expression is a combination of terms by the operations such as addition, subtraction, multiplication, division, etc.

Now, for the given statement "six less than a number".

Let the unknown number be x.

So, six less than a number is x-6.

Therefore, option B is the correct answer.

To learn more about the algebraic expression visit:

https://brainly.com/question/19245500.

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Answer:

log (2x)=3

log (3x)=2

3=log(x)