If (a − b)² = 40 and ab = 8, find a² + b².​

Answer:

0.33

Step-by-step explanation:

3/9 as a decimal is 0.33.

Hope this helps!

The graph of a function and the graph of its inverse are reflected across the line y = x.

Connsider a function f(x).

The inverse of function f(x) is represented as f^-1(x).

The inverse of a function is a function that reverses the effect of the original function.

We know that if we take the inverse of function then the domain of a function will be the range of inverse function and the range of a function will be the domain for its inverse.

This means if the point (3, -6) is in the original function then itwill be represented by the point (-6, 3) in the inverse function.

Also, we can obtain the graph of an inverse function as a reflection of the graph of original function across the line x = y.

Hence, the inverse functions' graphs are reflections over the line x = y

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Answer:

i dont think theres engouh info to answer that

Step-by-step explanation:

Answer:

27

Step-by-step explanation:

Answer: M x X

P x E

YW x RK

Step-by-step explanation:

App inventor's random integer block test is sufficient for app inventor's prng . but to increase our confidence in app inventor's prng we can do other tests like random fraction test and random set speed test.

The Coin Flip Experiment app allows you to run experiments aimed at determining how "good" the App Inventor PRNGs are. The app allows the user to "flip a coin" her N times and the results are displayed. They should record and count the results and calculate the average head percentage. The expectation of should reach 50% on average as N increases.

To properly test an App Inventor PRNG, you must test both the Random Integer and Random Fraction blocks along with the Random Fraction and Random set speed to blocks. Create dice simulations to get better than 50/50 predictions and reuse dice simulators for all combinations of different App Inventor random blocks. If such a combination yields the same results, then you can be confident that her PRNG in App Inventor provides a good model of randomness from all angles.

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The correct option regarding the sampling distribution of p, considering the Central Limit Theorem, is given as follows:

D. The shape of the sampling distrbution of p is approximately normal because n <= 0.05N and np(1 -p) > 10.

The mean of the sampling distribution of p is of:

0.388.

The standard deviation of the sampling distribution of p is of:

0.0184.

The Central Limit Theorem defines the distribution of the sampling distribution of sample proportions of a proportion p in a sample of size n, in which:

As long as these two conditions are respected:

The values of the parameters in this context are given as follows:

N = 30000, n = 700, p = 0.388.

Hence the conditions are:

Then the shape is approximately normal and option D is correct.

The mean of the distribution is of:

\(\mu = p = 0.388\)

The standard error of the distribution is of:

\(s = \sqrt{\frac{p(1 - p)}{n}} = \sqrt{\frac{0.388(0.612)}{700}} = 0.0184\)

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The actual divorce rate in the United States is around 39%, and it is important to consider the specific factors that contribute to divorce rates rather than relying on a generalization about marriage.

The statistic that half of all marriages end in divorce is not an accurate depiction of the situation.

The statement is false.The statement that half of all marriages end in divorce is a widely held belief that has been perpetuated by popular media, but it is not an accurate depiction of the situation.

The actual divorce rate in the United States has been declining since the 1980s and is currently around 39%.The misconception about the high divorce rate is due in part to the fact that many people get divorced more than once, inflating the overall divorce rate.

Additionally, certain demographics are more likely to get divorced than others, such as those who marry at a young age or those with lower levels of education. Therefore, it is important to consider the specific factors that contribute to divorce rates rather than relying on a generalization about marriage.In conclusion, the statement that half of all marriages end in divorce is false.

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Answer:

324, 900, 9

Step-by-step explanation:

When a shape has its size increased by a scale factor, the size of its lengths are multiplied by this scale factor, yet its area is actually multiplied by the scale factor squared. This is due to two lengths being multiplied to contribute to the area, not just one. If it was a volume, you would multiply by the scale factor cubed!

Onto the answer, just follow the advice above:

36 * 3^2 = 36 * 9 = 324 square inches,

36 * 5^2 = 36 * 25 = 900 square inches,

36 * 0.5^2 = 36 * 0.25 = 9 square inches.

It is not possible to find two numbers with two decimal places that round to 312 when rounded to one decimal place and have a total of 62.4.

To solve this problem systematically, we can break it down into smaller steps:

Let's assume the two numbers are x and y, both with two decimal places.

We can represent them as x = a.b and y = c.d, where a, b, c, and d are digits.

Rounding x and y to one decimal place gives us the following equations:

Round(x) = a.b ≈ 312

Round(y) = c.d ≈ 312

Since the total of the numbers is 62.4, we have the equation:

x + y = a.b + c.d

= 62.4

From Step 2, we know that both a.b and c.d are approximately equal to 312.

So, we can write:

a.b ≈ 312

c.d ≈ 312

Since a.b and c.d are rounded to one decimal place, we can rewrite them as:

a.b = 312 + p

c.d = 312 + q

p and q are the decimal parts that were rounded.

Substituting the new representations of a.b and c.d into the equation from Step 3, we get:

(312 + p) + (312 + q) = 62.4

Simplifying the equation gives us:

624 + (p + q) = 62.4

Solving for (p + q), we have:

p + q = 62.4 - 624

= -561.6

Since p and q are decimal parts, they must be between 0 and 1. -561.6 is outside this range, which means there are no values for p and q that satisfy the given conditions.

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Answer:

y=12

Step-by-step explanation:

y=2x ,so 2x=8x-x^2

x^2=8x-2x

x^2=6x

x^2/x=6x/x

x=6

y=2x ,2(6)

y=12

Answer:

5

Step-by-step explanation:

Every number from the absolute sign will be positive.

In graphing the results of an experiment, the independent variable is placed on the "x-axis" (horizontal) and the dependent variable is placed on the "y-axis" (vertical).

Though everything can be always related to its reason when we talk about two related things, there might happen that one of those things is dependent on the other.

If a variable is assuming then its values are independent of any visible straight cause, then that variable is called an independent variable.

The variables that take their values based on some variables' values are called dependent variables.

The answers would be "x-axis" (horizontal) and  "y-axis" (vertical) ; respectively.

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Answer:

i think its 8

Step-by-step explanation:

25 divided by 3 is eight.

Answer:

hi

Step-by-step explanation:

area of square is a²

14²=196 m

haveca nice day

Approximately 32% of students scored above 86 on the university exam.

To determine the percentage of students who score above 86, we can use the 68-95-99.7 rule, also known as the empirical rule or the three-sigma rule.

According to this rule, in a normal distribution:

Approximately 68% of the data falls within one standard deviation of the mean.

Approximately 95% of the data falls within two standard deviations of the mean.

Approximately 99.7% of the data falls within three standard deviations of the mean.

Given that the mean is 78 and the standard deviation is 8, we can calculate the z-score for 86 using the formula:

z = (x - μ) / σ, where x is the value, μ is the mean, and σ is the standard deviation.

z = (86 - 78) / 8 = 1

Since 86 is one standard deviation above the mean, we know that approximately 68% of students scored below 86. Therefore, the percentage of students who score above 86 can be estimated as 100% - 68% = 32%.

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Answer:

C is the correct answer

As both angles are exterior angles on parallel lines , we get the value of x equals to 10.19°.

What are parallel lines ?

Two or more lines that lie in the same plane and never intersect each other are known as parallel lines.

The angles given are exterior angles . Also , the two lines are parallel to each other and they are intersected by a line on two points.

These two angles will be equal in measure.

i.e.,

3x² - 20x = 189 - 8x

3x² - 12x - 189 = 0

Now , dividing by 3 , we get :

x² - 4x - 63 = 0

This is a quadratic equation of form ax² + bx + c = 0 and here a = 1 , b = -4 and c = - 63.

We have to use the quadratic formula to find value of x.

\(x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\)

x = [ 4 ± √(-4² - (4 × 1 × - 63))] / ( 2 × 1 )

x = [ 4 ± √268 ] / 2

x = [ 4 ± 16.38 ] / 2

x = 2 ± 8.19

So , the value of x can be either 2 + 8.19 or 2 - 8.19 which is equal to 10.19 or -6.19. Angle can't be negative , so x = 10.19°.

Therefore , after using the parallel lines concept for two exterior angles , we get the value of x equals to 10.19°.

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Answer: +

Step-by-step explanation:

Answer:

2, 18, 56.54

Step-by-step explanation:

hope this helped!

Answer:

9d+3

Step-by-step explanation:

(6d+5)-(2-3d)= cancel out parentheses

6d+5-2+3d= Commutative property of addition

6d+3d+5-2= Group like terms

(6d+3d)+(5-2)= Combine like terms

Answer = 9d+3

Let's call the length of the rectangle "L" and the width "W". We know that the width is 10 cm shorter than the length, so we can write.

W = L - 10
We also know that the area of the rectangle is 200 cm 2, so we can write:
A = L x W
Substituting W = L - 10, we get:
A = L x (L - 10)
Expanding the brackets, we get:
A = L^2 - 10L
Now we can substitute in A = 200 and solve for L:
200 = L^2 - 10L
0 = L^2 - 10L - 200
We can use the quadratic formula to solve for L:
L = (-b ± sqrt(b^2 - 4ac)) / 2a
Where a = 1, b = -10, and c = -200. Plugging in these values, we get:
L = (10 ± sqrt(10^2 - 4(1)(-200))) / 2(1)
L = (10 ± sqrt(1100)) / 2
L = (10 ± 10sqrt(11)) / 2
L ≈ 19.9 or L ≈ -9.9
We can disregard the negative solution since we're dealing with lengths, so the length of the rectangle is approximately 19.9 cm.
Now we can use W = L - 10 to find the width:
W = 19.9 - 10
W ≈ 9.9 cm
Therefore, the length of the rectangle is approximately 19.9 cm and the width is approximately 9.9 cm.

To find the length and width of a rectangle whose width is 10 cm shorter than its length and whose area is 200 cm², follow these steps:
1. Define the variables: Let the length of the rectangle be L cm, and the width be W cm.
2. Use the given information: Since the width is 10 cm shorter than the length, we can write the equation W = L - 10.
3. Use the formula for the area of a rectangle: The area of a rectangle is given by the formula A = L × W.
4. Substitute the given area and the equation from step 2: In this problem, the area is 200 cm², so we have 200 = L × (L - 10).
5. Solve the equation for L: Expand the equation to get 200 = L² - 10L. Rearrange the equation to L² - 10L - 200 = 0.
6. Factor the quadratic equation or use the quadratic formula: (L - 20)(L + 10) = 0. This gives two possible values for L: L = 20 cm or L = -10 cm.
7. Discard the negative value: Since the length of a rectangle cannot be negative, we discard the value L = -10 cm. So, the length L is 20 cm.
8. Find the width using the equation from step 2: W = L - 10 = 20 - 10 = 10 cm.
Thus, the length and width of the rectangle are 20 cm and 10 cm, respectively.

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The reason why the given graph relation is considered to be a function is because;

A. Yes, because every x-value corresponds with a single y-value.

From the given graph, we see the (x, y) coordinates as;

(5, 4)

(7, 2)

(6, 9)

(3, 10)

Now, we see that none of the x-values are the same and likewise none of the y-values are the same.

This means that each of the x-values have a unique y-value.

Thus, it can be said to be a function

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To determine the electric field in the region at the coordinates (3,4,5), we need to calculate the negative gradient of the electric potential function V(x, y, z) = x^2 + xy^2 + 2yz.

The electric field (E) is the negative gradient of the electric potential (V), given by E = -∇V, where ∇ represents the gradient operator.

Taking the partial derivatives of V with respect to x, y, and z, we have:

∂V/∂x = 2x + y^2

∂V/∂y = 2xy + 2z

∂V/∂z = 2y

Substituting the coordinates (3,4,5) into these partial derivatives, we get:

∂V/∂x = 2(3) + (4^2) = 2(3) + 16 = 6 + 16 = 22

∂V/∂y = 2(3)(4) + 2(5) = 24 + 10 = 34

∂V/∂z = 2(4) = 8

Therefore, the electric field at the coordinates (3,4,5) is given by E = (-22, -34, -8).

The electric field at the coordinates (3,4,5) in the given region, where the electric potential function is V(x, y, z) = x^2 + xy^2 + 2yz, is (-22, -34, -8). The negative gradient of the potential function gives us the electric field, and the coordinates are substituted to calculate the partial derivatives of the potential function with respect to x, y, and z.

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Answer:

OK

Step-by-step explanation:

A graphing calculator is a handheld computer that is capable of plotting graphs and solving mathematical equations. It has a variety of functions that make it an excellent tool for solving problems related to algebra, geometry, and calculus. One of the most important applications of a graphing calculator is in the field of factoring polynomials.

In this essay, we will discuss how the graphing calculator can be used along with the factor theorem to make factoring polynomials more efficient.  Factoring polynomials is an important concept in algebra. It is used to simplify expressions and solve equations.

The graphing calculator can be used to find the zeros of a polynomial. To do this, we first need to enter the polynomial into the calculator. Once we have done this, we can plot the graph of the polynomial. The zeros of the polynomial are the x-intercepts of the graph.

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Answer:

the answer is 6 just add the radius of both circle

Answer:

OP is 6

Step-by-step explanation:

Because we av being given d parameters

4 is d radius of the first circle and 2 is d radius of the second circle so automatically d answer is 6

Answer:

Step-by-step explanation:

a) y = \(\frac{7}{2}\)X

b) 7/2 * 4 = 157.5

c) y = \(\frac{7}{2}\)X + 42.43

d) 70.71  more minutes to finish reading  :)

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Work Shown:

Apply the Law of Sines to get the following. Make sure your calculator is in degree mode.

\(\frac{\sin(A)}{a}=\frac{\sin(B)}{b}=\frac{\sin(C)}{c}\\\\\frac{\sin(A)}{a}=\frac{\sin(C)}{c}\\\\\frac{\sin(20)}{4}=\frac{\sin(87)}{c}\\\\c*\sin(20)=4*\sin(87)\\\\c=\frac{4*\sin(87)}{\sin(20)}\\\\c\approx 11.6791897\\\\c\approx 11.7\\\\\)

So that's why the answer is choice D) 11.7