Find the Mean
34,39,40,47,

The value of A in solving the considered quadratic equation by completing the squares method is given by: Option

Suppose the considered quadratic equation is of the form [tex]ax^2 + bx + c = 0[/tex]

Then, completing the squares method tries to make a squared term in terms of x in the left side, so that x comes in linear form, instead of quadratic, as shown below:

[tex]ax^2 + bx + c = 0\\ax^2 + bx = -c\\\\\text{Multiplying 4a on both the sides}\\4a^2x^2 + 4abx = -4ac\\\\\text{Adding }b^2\text{ on both the sides}\\4a^2x^2 + 4abx + b^2 = b^2 -4ac\\or\\(2ax +b)^2 = b^2 - 4ac\\2ax + b = \pm \sqrt{b^2 - 4ac}\\\\x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/tex]

This provides two solution to the considered quadratic equation. These solutions can be real, or imaginary.

For the considered case, the quadratic equation is:

[tex]10x^2 + 40x - 13 = 0[/tex]

Applying the method as Isoke did, we get:

[tex]10x^2 + 40x - 13 = 0\\10x^2 + 40x = 13\\10(x^2 + 4x) = 13[/tex]

Therefore, we get the value of A as 10.

Learn more about completing the squares here:

https://brainly.com/question/9339524

Answer:

C

Step-by-step explanation:

edge 2022

The value of alpha is 0.26, assuming a confidence level of 74%.

The significance level α is the probability of making the wrong decision when the null hypothesis is true.

Alpha levels which is also called as significance levels are used in hypothesis tests.

Given

When finding the margin of error for the mean of a normally distributed population from a sample.

The confidence interval = 74% = 0.74.

The value of the alpha is given by;

[tex]\rm \alpha =1- Confidence \ interval[/tex]

Substitute all the values in the formula

[tex]\rm \alpha =1- Confidence \ interval\\\\\alpha=1-0.74\\\\\alpha=0.26[/tex]

Hence, the value of alpha is 0.26, assuming a confidence level of 74%.

To know more about confidence interval click the link given below.

https://brainly.com/question/26725727

x+10 =5 that is the answer because look at the example

The scatterplot can show an association or no association, at all.

The type of association shown by the graph that relates test grades and shoe sizes of the students in Dexter's class is no association

When the points on the graph of the scatter plot follows an approximately, straight line; then the relationship is a linear relationship.

If it follows a curve, then it is a nonlinear relationship

If the points are scattered, then it shows no association.

The points on the graph are scattered, and they do not follow a specific pattern.

Hence, the graph shows no association

Read more about scatterplots at:

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Answer:

Girl... your answer is

A) Students who studied more tended to score higher.

Thank You very much :)

Answer:

im not sure, but i go to the same school! If you want practice questions go to your teachers home page then click module 7 then click "DBA" it has questions and reviews!

Step-by-step explanation:

go to the hope page and look for your module!

Answer:

It will still be 80.5

Step-by-step explanation:

The 8 is in the TENS place, the 0 is in the ONES place and the 5 is in the TENTHS place. There is no number in the hundredths ace so you have to anex a 0, 0 means the number stays the same; so the answer is 80.5

Answer:

Option B

Step-by-step explanation:

→ It cannot have a bx coefficient in ax² + bx + c which eliminates all but 1 option

Answer:

  B.  (x +4)(x -4)

Step-by-step explanation:

The x-intercepts are shown on the graph to be at x=-4 and x=4. For x-intercept p, there is a factor (x-p). That means the factored form is ...

  (x -(-4))(x -(4)) = (x +4)(x -4)

_____

Additional comment

The product of these factors is x^2 -16, consistent with the vertex on the graph being located at (0, -16).

Answer:

x=14.3

Step-by-step explanation:

its the Pythagorean theorem

Answer:

2%

Step-by-step explanation:

(100 × (33.32 / 34 - 1)

Answer:

Dogs: 44.44 Cats: 55.556

Step-by-step explanation:

*this is only if you are allowed to use a calculator*

1. You have to add the total of the cats and dogs

Why? Here, let me put it this way. You have a test with two sections: math and science. If there are 2 Maths Questions and 2 Science questions, what percent of the test are math questions? You would not say 2/2 and say 100. You would say 2/4 because it is obvious. You do the same in this case but it is not as noticeable because you are dealing with bigger numbers.

15 + 12 = 27.

2. Solve

a. There are 15 dogs and 12 cats that makes up 27 pets total.

So you have to do 12/27 for cats,

15/27 for dogs. The fractions equal one and It shows you how much of one is there compared to the total.

b. Simplify

You can simplify these fractions:

for 12/27, divide the numerator and the denominator by 3.

You get 4/9

Divide 15/27 for dogs by 3 as well to get 5/9.

5+4 is 9, which means that I am doing the math correctly.

According to the calculator, 5/9 is 55.556, and 4/9 is 44.444

They should be accurate because there are more dogs than cats and the percentage for dogs are higher. Hence, this is correct.

Cats = 4/9 = 44.444%

Dogs = 5/9 = 55.556%

Hope this helps :)

-jp524

Answer:

Hello

Step-by-step explanation:

The answer would be 165

Hope this helps

Step-by-step explanation:

I solved it by steps...

I hope you understand...

Answer:

Step-by-step explanation:

Answer:

27 days

Step-by-step explanation:

15% of 180 = 27

Answer: The Answer is c) 24

Step-by-step explanation: you do 15/100 x 160 in a calculator and you find the answer

Answer:

270.99

Step-by-step explanation:

1/3×3.14×8^2

=66.99

9×11

=99

15×7

=105

66.99+99+105

=270.99

im not sure if im right

The price-demand relationship of the company is a linear model

The equation that models the price-demand relationship is y = -20x + 1960

From the question, we have the following points:

(x, y) = (88, 200) and (38, 1200)

The equation of the linear relationship is then calculated as:

[tex]y = \frac{y_2 - y_1}{x_2 -x_1} * (x - x_1) + y_1[/tex]

Substitute known values in the above equation

[tex]y = \frac{1200 - 200}{38 -88} * (x - 88) + 200[/tex]

Evaluate the difference

[tex]y = \frac{1000}{-50} * (x - 88) + 200[/tex]

Evaluate the quotient

[tex]y = -20 * (x - 88) + 200[/tex]

Expand

[tex]y = -20x + 1760 + 200[/tex]

Evaluate the sum

[tex]y = -20x + 1960[/tex]

Hence, the equation that models the price-demand relationship is y = -20x + 1960

Read more about linear relationships at:

https://brainly.com/question/14323743

Answer:

yes

Step-by-step explanation:

as you can see if you count them they are

Answer:

The shape on the very left of the picture is not a quadrilateral. However, the three other shapes are quadrilaterals.

Step-by-step explanation:

A shape is a quadrilateral if it has four sides and four angles. The shape on the left has five sides and five angles, therefore, not a quadrilateral.

Step-by-step explanation:

error

Polynomial error: You have used illegal character ( = )..

Step by Step Solution

More Icon

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

49-((2+5)*2)=0

STEP

1

:

Equations which are never true:

1.1 Solve : 35 = 0

This equation has no solution.

A a non-zero constant never equals zero.

No solutions found

Answer:

Lucas's table is proportionate

Step-by-step explanation:

if you divide each number of page (for Lucas) by the time you will get a scale factor of 19. whereas the scale factor for Brianna's table is all over the place(she doesn't have a definite scale factor)

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Answer:

i think is C

I'm not sure about it

Step-by-step explanation:

Steps of Construction

(i) Draw ray AB.

(ii) Construct  ∠BAC = 60°.

(iii) Construct  ∠BAD = 90°.

(iv) Bisect ∠CAD, so that ∠CAE = ∠EAD = 15°.

(v) We obtain  ∠BAE = ∠BAC + ∠CAE = 60° + 15° =75°.

Hope this Helps!!!!

[tex] \frac{1}{2} (29 - x) = 7.75[/tex]

[tex] \frac{1}{2} ( - x + 29) = 7.75[/tex]

[tex] \frac{1( - x + 29)}{2} = 7.75[/tex]

[tex] \frac{ - x + 29}{2} = 7.75[/tex]

[tex]2· \frac{ - x + 29}{2} = 2·7.75[/tex]

[tex] - x + 29 = 2·7.75[/tex]

[tex] - x + 29 = 15.5[/tex]

[tex] - x + 29 = 15.5 - 29[/tex]

[tex] - x = - 13.5[/tex]

[tex] \frac{ - x} {- 1} = \frac{ - 13.5 }{ - 1 } [/tex]

[tex]x = 13.5[/tex]

So, the value of x is 13.5.

Answer:

18.6 inches

Step-by-step explanation:

simple

Answer:

A.) 1644

given equation:  [tex]\sf p(x)=x^4-9x^3-5x^2-3x+4[/tex]

To be divided with ( x + 5 )

Then,

x + 5 = 0

x = -5

Put this into the equation to find the remainder.

[tex]\sf p(x)=(-5)^4-9(-5)^3-5(-5)^2-3(-5)+4[/tex]

[tex]\sf p(x)= 1644[/tex]

Use the remainder theorem to find the remainder when p(x)=x^4-9x^3-5x^2-3x+4 is divided by x+5

B.) 1244

C.) -636

D.) -644

~~~~~~~~~~~~~~~~~~~~~

[tex]\sf p(x)=x^4-9x^3-5x^2-3x+4[/tex]

[tex] \sf p(x) = (-5)^4 - 9(-5)^3 (-5)^2 - 3 (-5) + 4 [/tex]

[tex] \sf \green {(p(x) = 1644)} [/tex]

#CarryOnLearning

#LibreAngMatuto

Answer:

3)  48 units²

6)  46 units²

Step-by-step explanation:

Question 3

This shape is a parallelogram with base of 8 units and height of 6 units.

Area of a parallelogram = base × height

                                        = 8 × 6

                                        = 48 units²

Question 6

This shape is a quadrilateral.  It is made up of 3 triangles and a rectangle (see attached image for how to divide the quadrilateral)

Area of rectangle = width × length

                              = 4 × 6

                              = 24 units²

Area of a triangle = 1/2 × base × height

Triangle 1:   1/2 × 2 × 4 = 4 units²

Triangle 2:   1/2 × 6 × 2 = 6 units²

Triangle 3:   1/2 × 4 × 6 = 12 units²

Total area = 24 + 4 + 6 + 12 = 46 units²