PLEASE HELP AND EXPLAIN

Solve the following equation by factoring 2x^2 - x = 2-4x

For the first exam we know that:

So, Ayden was 2.5 five standard deviation away from the mean:

For the second exam, we know that:

To do equivalently, Ayden score must be 2.5 standar deviations away from the mean, so:

Answer: c=5

Step-by-step explanation:

5(c-3)=10

5c-15=10

5c=10+15

5c=25

c=5

Answer:

5(c-3)=10

(c-3) =10-5

(c-3)=5

c=5+3

c=8

Answer:

Factored -> (x+7)(x-2)

Step-by-step explanation:

If you are solving for x then its x= -7, x=2

Answer:

A: sqrt(11)

B: 4.2

C: sqrt(26)

Step-by-step explanation:

First, 4^2 = 16

That means that sqrt 11 is smaller than 4.2 (a value greater than 4). This is because sqrt16>sqrt11.

Sqrt(26) is greater than sqrt(25) = 5. That means that it's greater than 4.2.

Hence, the order given above.

To calculate the standard error of estimate (SE), we can use the following formula:

SE = sqrt(SSE / (n-2))

where SSE is the sum of squared errors, and n is the number of observations.

Substituting the given values, we get:

SE = sqrt(2,540 / (30-2)) = 5.49

Therefore, the standard error of estimate is 5.49 (rounded to 2 decimal places).

b. The coefficient of determination (R-squared) is given by the ratio of the explained variation (SSR) to the total variation (SST):

R² = SSR / SST

where SSR is the sum of squared regression, and SST is the total sum of squares.

Since this is a simple linear regression, we have:

SST = SSR + SSE

where SSE is the sum of squared errors.

Substituting the given values, we get:

SST = 13,870

SSE = 2,540

Therefore, we can calculate SSR as:

SSR = SST - SSE = 13,870 - 2,540 = 11,330

Substituting these values into the formula for R-squared, we get:

R²= SSR / SST = 11,330 / 13,870 = 0.8188

Therefore, the coefficient of determination (R-squared) is 0.8188 (rounded to 4 decimal places). This means that 81.88% of the variation in the dependent variable (y) can be explained by the linear regression model with the independent variable (x).

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The answers, rounded to the appropriate number of significant figures, are as follows:

(a) 1.088 ×\(10^2\)

(b) 2.132

(c) 1.3331 ×\(10^1\) and

(d) 1.05.

Let's calculate the answers to the given operations using the appropriate number of significant figures.

(a) 8.370×1.3×10

To perform this multiplication, we multiply the decimal numbers and add the exponents of 10:

8.370 × 1.3 × 10 = 10.881 × 10 = 1.0881 × \(10^2\)

Since the original numbers have four significant figures, we round the final answer to four significant figures:

1.088 × \(10^2\)

(b) 4.265/2.0

For division, we divide the decimal numbers:

4.265 ÷ 2.0 = 2.1325

Since both numbers have four significant figures, the answer should be rounded to four significant figures:

2.132

(c) (1.2588×\(10^3\))×(1.06×\(10^-^2\))

To multiply these numbers, we multiply the decimal numbers and add the exponents:

(1.2588 × \(10^3\)) × (1.06 × \(10^-^2\)) = 1.333128 × \(10^1\)

Since the original numbers have five significant figures, we round the final answer to five significant figures:

1.3331 × \(10^1\)

(d) \((1.11)^(^1^/^2^)\)

To calculate the square root, we raise the number to the power of 1/2:

\((1.11)^(^1^/^2^)\)= 1.0524

Since the original number has three significant figures, the answer should be rounded to three significant figures:

1.05

It's important to note that the significant figures in a result are determined by the original data and the operations performed. The final answers provided above reflect the appropriate number of significant figures based on the given information and the rules for significant figures.

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Total distance traveled during these 6 seconds = 80 feets

Given the data in the question-

Time (sec)        Velocity (ft/sec)

0                       13

1                        23

3                       24

4                       15  

5                        4

6                       10                          

Since the distance traveled is shown by.

Distance = Velocity x Time

And since the time interval in the question is given = 1 sec between any two breaks,

By the principle of left-end approximation -

According to the left-end approximation, the velocity given at each equal interval is determined by the function value at the left of each subinterval.

(0,1) ---------------- f (0) = 13

(1,2) ---------------- f (1) = 23

(2,3) --------------- f (2) = 24

(3,4) --------------- f (3) = 15

(4,5) --------------- f (4) = 4

(5,6) --------------- f (5) = 1

Now if we observe the time break between two-time intervals = 1 sec

The expression will be derived as -

= (13 x 1) + (23 x 1) + (24 x 1) + (15 x 1) + (4 x 1) + (1 x 1)

= 13 + 23 + 24 + 15 + 4 + 1

= 80 feets

Therefore, the total distance traveled during these 6 seconds = 80 feets

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The descriptions can be matched as follows: A fixed amount that you pay the provider at the time of service: Copayment. The percentage of the cost that you share with the insurance company: Coinsurance. A certain amount that you pay before the insurance company pays a claim: Deductible.

The descriptions provided in the question are related to different types of out-of-pocket expenses for an insurance policy.

1. A fixed amount that you pay the provider at the time of service: This refers to a copayment. A copayment is a predetermined, fixed amount that you are required to pay directly to the healthcare provider at the time of receiving a service or treatment covered by your insurance plan. It is typically a set fee for specific services, such as a doctor's visit or prescription medication.

2. The percentage of the cost that you share with the insurance company: This describes coinsurance. Coinsurance is the portion of the healthcare costs that you are responsible for paying, typically after you have met your deductible. It is calculated as a percentage of the total cost of the service or treatment, with the remaining percentage being covered by the insurance company.

3. A certain amount that you pay before the insurance company pays a claim: This corresponds to a deductible. A deductible is the fixed amount that you are required to pay out of your own pocket before your insurance coverage kicks in. Once you have reached your deductible amount, the insurance company will start covering a portion or all of the remaining costs, depending on the terms of your policy.

In summary, the descriptions match the out-of-pocket expenses as follows: copayment, coinsurance, and deductible.

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Answer: C

Step-by-step explanation:

Answer: I think the answer is A.

Step-by-step explanation:

In the equation a = 500 x (3/4)^t, the fraction 3/4 represents the rate at which the concentration of aspirin decreases over time in the person's body.

In the given equation, a represents the milligrams of aspirin in the person's body, t represents the number of hours since the patient took the medicine, and 3/4 is a fraction. The fraction 3/4 tells us about the rate at which the concentration of aspirin decreases over time in the person's body.

Specifically, it represents the proportion of the remaining amount of aspirin after each passing hour. Each hour, the concentration of aspirin is multiplied by 3/4, indicating that 3/4 of the previous amount remains. This implies that the concentration of aspirin diminishes by 25% (1 - 3/4 = 1/4 = 25%) every hour.

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Answer:-16

Step-by-step explanation:x + 5= -11

isolate x by subtracting 5 on both sides

x=-16

Answer:

11

Step-by-step explanation:

Because it's +5 every number

Answer:

11

Step-by-step explanation:

-9 +5=-4

-4+5=1

1+5=6

6+5=11

Answer:

b6

Step-by-step explanation:

hope you help

Answer:

The percent decrease in number of allergic reactions is 55%

Step-by-step explanation:

Only 4 of them had a mild allergic reaction. What is the percent decrease in number of allergic reactions?

Percent of allergic people= Allergic people/ Total people * 100

                                         = 9/1500* 100

                                         = 0.6 %

IT means that out of 1000 people only 6 persons are allergic to the cream.

New Percent of allergic people= Allergic people/ Total people * 100

                                         = 4/1500* 100

                                         = 0.267 %

It means that out of 1000 people only 2.67 persons are allergic to the new improved cream.

Difference between Percentage = Old Percentage- New Percentage

                                                      = 0.6 %- 0.267%

                                                       =0.333%

Decrease= 0.333% = 0.333/100

In every thousand people 3.33 people are free of allergic reactions from those 6 allergic people.

Percentage Decrease= Decrease/ Total * 100

                        = 0.333/ 0.6 *100

                           = 0.55*100

                            = 55 %

The percent decrease in number of allergic reactions is 55%

correct:

49 is a perfect square; 27 is a perfect cube; 14 isnt a perfect sqaure, nor a perfect cube;

false:

9 is not a perfect cube; 100 is a perfect cube, but not a perfect square.

can i have brainliest?-

The factored form of 3x^2 + 13x - 10 is (3x - 2)(x + 5).

To factor 3x^2 + 13x – 10 by grouping, we need to find two numbers whose product is 3(-10) = -30 and whose sum is 13.

Let's list all the factor pairs of -30:

-1, 30

-2, 15

-3, 10

-5, 6

Out of these pairs, the pair that adds up to 13 is -2 and 15.

We can use these numbers to rewrite the middle term:

3x^2 - 2x + 15x - 10

Now, we can group the first two terms and the last two terms:

(3x^2 - 2x) + (15x - 10)

We can factor out the greatest common factor from each group:

x(3x - 2) + 5(3x - 2)

Now, we can see that we have a common factor of (3x - 2):

(3x - 2)(x + 5)

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The given question is incomplete, the complete question is:

What is the factored form of 3x^2 + 13x - 10?

Answer:

Step-by-step explanation:

y = mx + b where: m= the slope = -5/6

1   ∙y=mx+b.

2  here m=5.

3  ⇒y=5x+b←is the partial equation.

4  9=5+b⇒b=9−5=4.

5  ⇒y=5x+4←is the equation of the line

How to Find the Equation of a Line from Two Points

Find the slope using the slope formula. ...

Use the slope and one of the points to solve for the y-intercept (b). ...

Once you know the value for m and the value for b, you can plug these into the slope-intercept form of a line (y = mx + b) to get the equation for the line.

The correct answer is option a. $7,594.46.

To calculate the amount you would reduce the amount you owe in the first year, we can use the formula for the equal installment of a loan. The formula is:

Installment = Principal / Number of Installments + (Principal - Total Repaid) * Interest Rate

In this case, the principal is $45,000, the number of installments is 5, and the interest rate is 8.5%.

Let's calculate the amount you would reduce the amount you owe in the first year:

Installment = $45,000 / 5 + ($45,000 - $0) * 0.085Installment = $9,000 + $3,825

Installment = $12,825

Therefore, you would reduce the amount you owe by $12,825 in the first year.The correct answer is option a. $7,594.46.

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Answer:  39/10          

Step-by-step explanation:

Multiply both top and bottom by 10 for every number after the decimal point:

As we have 1 numbers after the decimal point, we multiply both numerator and denominator by 10. So,

3.9

1

= (3.9 × 10)

(1 × 10)

= 39/10

Answer:

The time it takes to make rag dolls for a mission in Africa.

The time taken.

The cost of an end year party.

Step-by-step explanation:

The dependent variable refers to the variable which is predicted or measured in an experiment , the value of the dependent variable relies on the variation in the independent or predictor variable.

The time it takes to make rag dolls for a mission in Africa and the number of people working on the dolls ;

DEPENDENT VARIABLE = The time it takes to make rag dolls for a mission in AFRICA. This is because time taken will depend on the number of people working.

The distance travelled while walking and the time taken ;

DEPENDENT VARIABLE = THE time taken

The time taken will depend on distance traveled.

The cost of an end of year grade 9 party and the number of people attending ;

DEPENDENT VARIABLE = The cost of an end year party.

Cost of partybwill depend on the number of people attending.

The ratio is constantly 2 and greater than 1, the growth described by the sequence is exponential.

To determine the type of growth described by the given sequence of growth rates (2, 4, 8, 16, 32), let's analyze the pattern step by step:

Step 1: Calculate the ratios between consecutive terms:

4/2 = 2

8/4 = 2

16/8 = 2

32/16 = 2

Step 2: Determine if the ratios are consistent.

Since the ratios between consecutive terms are all equal to 2, this indicates that the growth is consistent. Consistent growth means that each term is obtained by multiplying the previous term by the same constant ratio.

Step 3: Identify the type of consistent growth.

To identify the specific type of consistent growth, we can examine the values of the ratios.

If the ratio is less than 1, it would indicate a decaying or diminishing growth.

If the ratio is equal to 1, it would indicate linear or arithmetic growth.

If the ratio is greater than 1, it would indicate exponential growth.

If the ratio approaches a limit as the terms progress, it would indicate logistic growth.

In this case, since the ratio is constantly 2 and greater than 1, the growth described by the sequence is exponential.

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Answer:

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

Answer:

x = 3

Step-by-step explanation:

Multiply both sides by 3. I take it mean 1/3 * x and not 1/(3*x) which puts x in the denominator.

6x - 15 = (1/3) x * 3             Cancel on the right.

6x - 15 = x                          Subtract 6x from both sides.

6x - 6x - 15 = x - 6x           Collect light terms

- 15 = - 5x                          Divide by - 5

-15/-5 = -5x/-5

x = 3

Answer:

y/( 3b-7)=x

Step-by-step explanation:

y=3bx-7x

Factor out x

y=(3b-7)x

Divide each side by (3b-7)

y/( 3b-7)=(3b-7)x/ ( 3b-7)

y/( 3b-7)=x

Answer:

\(\huge \boxed{x= \frac{y}{3b-7} }\)

Step-by-step explanation:

\(\sf y=3bx-7x\)

Factor out x from the expression.

\(\sf y=x(3b-7)\)

Divide both sides by (3b - 7).

\(\sf \displaystyle \frac{y}{3b-7} =x\)

Answer:

oh ok. So, first, you get the equation in the form y=ax2+bx+c. Next, you calculate -b / 2a. This is the x-coordinate of the vertex. Then finally, you plug in the value of -b / 2a into the equation into the x variable and solve for the y variable. This is the coordinate of the vertex.

Step-by-step explanation:

Hope this helps!

Answer:

r = 100(\(\frac{A}{P}\) - 1 )

Step-by-step explanation:

Given

A = P(1 + \(\frac{r}{100}\) ) ← divide both sides by P

\(\frac{A}{P}\) = 1 + \(\frac{r}{100}\) ( subtract 1 from both sides )

\(\frac{P}{A}\) - 1 = \(\frac{r}{100}\) ( multiply both sides by 100 )

100 ( \(\frac{P}{A}\) - 1) = r

Answer:

  (b)  $467.30

Step-by-step explanation:

You want the interest due after 15 months on a $6000 loan at 6%, compounded continuously.

The formula for interest due on the loan is ...

  I = P(e^(rt) -1)

where P is the principal amount of the loan at annual rate r for t years.

For this loan, the interest due is ...

  I = $6000(e^(0.06·(15/12)) -1) ≈ $467.30

The interest owed is ...

  (b)  $467.30

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The required probability of rolling either 3 or 5 after rolling 12-sided number cube is given by 41.67%.

Number of sides of cube with faces numbered = 12

Sample space = 1,1,2,2,3,3,3,4,4,4,5,5

Probability

= ( number of favourable outcomes )/ (Total number of outcomes)

Probability of rolling either a 3 or 5

= (Number of ways 3 or 5 rolled )/ ( total number of possible outcomes)

Numbers of ways 3 rolled = 3

Number of ways 5 rolled = 2

Total number of ways 3 or 5 rolled = 5

Total number of cube number rolled = 12

Probability of rolling either a 3 or 5 = 5/12

                                                          = 0.41666

                                                        = 41.67% (rounded to the nearest tenth)

Therefore, the probability of rolling either a 3 or 5 is 41.67%( rounded to the nearest tenth).

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Answer:

0.0304347826

Step-by-step explanation:

Answer: 32.8571428571429 or 0.0304347826086957

Step-by-step explanation:

Hope this helped