A charity needs to report its typical donations received. The following is a list of the donations from one week. A histogram is provided to display the data. 10, 10, 10, 10, 15,15,15,19, 20, 20, 20, 25, 25, 25, 30, 30, 55, 55 A graph titled Donations to Charity in Dollars. The x-axis is labeled 10 to 19, 20 to 29, 30 to 39, 40 to 49, and 50 to 59. The y-axis is labeled Frequency. There is a shaded bar up to 8 above 10 to 19, up to 6 above 20 to 29, up to 2 above 30 to 39, and up to 2 above 50 to 59. There is no shaded bar above 40 to 49. Which measure of variability should the charity use to accurately represent the data? Explain your answer.

Answer:

an=a1rn−1 a n = a 1 r n - 1

Step-by-step explanation:

multiplying the previous term in the sequence by 2 gives the next term

I hope this helps...

Have a nice day<3

Answer:

Step-by-step explanation:

You want the solutions to various problems involving ratios, proportions, and scale factors.

The ratio of 15 apples ot 25 oranges can be written several ways, with and without units:

  15 apples to 25 oranges, or 15 to 25.

  Reduced to 3 apples to 25 oranges, or 3 to 5

  15 apples : 25 oranges, or 15 : 25

  Reduced to 3 apples : 5 oranges, or 3 : 5

  15 apples / 25 oranges, or 15/25

  Reduced to 3 apples / (5 oranges), or 3/5

You can solve the proportion ...

  x/9 = 10/12

by multiplying both sides by 9:

  x = 9·10/12 = 90/12

  x = 15/2 = 7.5

If each inch represents 12 ft, then 8 inches represents 8·12 ft = 96 ft.

The actual length of the back wall is 96 feet.

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Answer:

90 square feet

Step-by-step explanation:

area of rectangle = 12 X 30 = 360 square feet

look at the green triangle in top left. it has area 0.5 X (12 - 3) X (30)

= 0.5 X 9 X 30 = 135

area of other green triangle is equal (they are congruent)

so, the area of the path is 360 - 2 (135) = 360 - 270 = 90 square feet

The explicit formula an=−4n−1 represents the sequence defined recursively by a1=1 and an=−4an−1 for n≥2.

The given sequence is defined recursively as follows: a1=1 and an=−4an−1 for n≥2.

To find the explicit formula for this sequence, we need to express the nth term of the sequence in terms of n without any reference to the previous terms.

Let's write out the first few terms of the sequence to look for a pattern:

a1=1

a2=−4a1=−4

a3=−4a2=16

a4=−4a3=−64

a5=−4a4=256

It seems that each term is obtained by multiplying the previous term by -4. In general, we can write:

an=−4n−1

This is the explicit formula that represents the given sequence. We can check that it satisfies the recursive formula by substituting it into the recurrence relation:

a n​ =−4a n−1​ = −4(-4^(n-2)) = -4^(n-1) = -4n-1

Therefore, the explicit formula an=−4n−1 represents the sequence defined recursively by a1=1 and an=−4an−1 for n≥2.

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If Bill has 20 apples and Sarah has 15 apples, and they put them in a big pile and eat half, then There are 17.5 apples left.

Bill has 20 apples and Sarah has 15 apples. When they put them together in a pile, the total number of apples is 20 + 15 = 35. They eat half of the apples, which is equivalent to dividing the total number of apples by 2.

35 / 2 = 17.5

Therefore, there are 17.5 apples left after they eat half of the pile. It's important to note that while the concept of "half an apple" may not be physically possible, we can still express the result as a decimal to represent the fractional amount remaining. In this case, 17.5 represents the remaining apples after dividing the original pile in half.

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Answer:

3/10

Their favourite is pizza

Step-by-step explanation:

30% = 30/100

simplified is 3/10

Answer:

3/10

Step-by-step explanation:

1. 30%=3/10

2. The schools favorite lunch is pizza

In a time-series graph, the horizontal axis is marked off in units of time, such as days, months, quarters, or years. The time intervals between the marks on the horizontal axis are usually equal, which allows the graph to show changes in the variable being measured over time.

The vertical axis of the graph shows the values of the variable being measured, and the line or curve connecting the points on the graph represents the trend of the data over time. Time-series graphs are often used to visualize patterns and trends in economic, financial, and other types of data that vary over time.

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1) Trigonometric ratios for similar triangles state that the ratios of corresponding sides of similar triangles are equal. 2) The sine and cosine of complementary angles have the property of being not only equal but also complementary to one another. 3) trigonometric ratios can be used to solve for a missing side or angle of a right triangle.

1. Trigonometric ratios for similar triangles state that the ratios of corresponding sides of similar triangles are equal. Therefore, the ratios of the sine, cosine, and tangent of the corresponding angles in similar triangles will also be equal.

2. The sine and cosine of complementary angles have the property of being not only equal but also complementary to one another. This means that the sine of an angle is equal to its complement's cosine, and vice versa.

3. Using the appropriate formula based on the given information, trigonometric ratios can be used to solve for a missing side or angle of a right triangle.

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[tex]A(x)=4x^2-5x-3x^3+6[/tex]    and   [tex]B(x)=3x^3-5x-4+6x^2[/tex]. Sort the polynomial A(x), B(x) according to the decreasing power of the variable. The final solution for N(x) is;

  [tex]N(x)=10x^2-10x+2[/tex]

To type the polynomials A(x) and B(x) in line with the lowering energy of the variable, we want to arrange the phrases in order that the highest diploma term comes first, observed with the aid of the next maximum diploma time period, and so forth. We also want to mix any like phrases which have identical diplomas. For example, A(x) has two terms with degree 2, so we will upload them collectively. Here is how we kind A(x) and B(x):

[tex]A(x) = -3x^3 + 4x^2 - 5x + 6[/tex]

[tex]B(x)=3x^3+6x^2-5x-4[/tex]

To calculate N(x) = A(x) + B(x), we want to feature the corresponding phrases of A(x) and B(x) which have an equal degree. For example, to locate the coefficient of [tex]x^3[/tex] in N(x), we want to add the coefficients of x^three in A(x) and B(x), which might be -3 and +3 respectively. Here is how we calculate N(x):

[tex]N(x)=(-3+3)x^3+(4+6)x^2+(-5-5)x+(6-4)[/tex]

[tex]N(x)=10x^2-10x+2[/tex]

This is the final solution for N(x).

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The area of the figure E in terms of x  is x² + 2xy + y²

The figure is added as an attachment

The dimensions of the figures are

A = x by x

B = x by y

C = y by y

D = x by y

So, we have

Area of A = x²

Area of B = xy

Area of C = y²

Area of D = xy

This means that the area of E is

E = x² + 2xy + y²

From the above, we can see that the expression has 3 terms

Also, we have the coefficient of x² to be 1 and the coefficient of x to be 2y

The degree of the expression is 2

This is because the highest power is 2

The name of the algebraic expression is a sum of squares

Lastly, we have

x = 3 and y = 2

This means that

Area = 3² + 2 * 3 * 2 + 2²

Evaluate

Area = 25

Hence, the value of the expression is 25

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Answer: B. Food

Step-by-step explanation:

The triangle with segments AB=4cm,BC=6 cm and angle ABC=90° is constructed

We follow the certain steps to construct a triangle ABC

Firstly we have to draw a line segment AB = 4 cm and extend till X

By using Compass draw an arc taking B as center intersecting at P & Q on AB & BX

Increasing compass width slightly taking P as center Draw an arc

Now by keeping the same measurements with compass draw arcs taking Q as center such that it intersects arc drawn in step 3 at R

Now draw a line from B passing through R  and taking length = 3 cm and mark the other end as C

Now join AC

Construct perpendicular  Bisector of AC at O

By taking O as center and radius = OA = OB = OC , draw an circle

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Using a ruler and a pair of compasses only,construct

(i) a triangle ABC ,given AB=4cm,BC=6 cm and angle ABC=90°.

(ii) a circle which passes through the points A,B and C and mark its centre as O.

A. The distance from the x - axis to the top of the circle is 10.3 feet

B. The equation of the circle is (x - 2)² + (x² - 3)² = 4

C. The equation of the parabola is x = a(y - k)² + h

D. The area of the window is 9.2 ft²

A. (14.6 - x)² + (4.6/2)² = 10.6 { Pythagores theorem"}

(14.6 - x) + 5.29 = 112.36

(14.6-x)² = 112.36 - 5.29

14.6-x)²= 107.07

(14.6 - x)² = 107.07

X= 213.16 - 107.07

x = 106.09

X=10.3 feet

B. The equation of the circle is (x - 2)² + (x² - 3)² = 4

The equation represents a circle centered at the point (2, 3) with a radius of 2 units, as determined by the standard form equation of a circle:

(x - h)² + (y - k)² = r²

where (h, k) is the center of the circle and r is the radius.

C. The equation of the parabola is x = a(y - k)² + h

D. The area of the window is determined using the following below:

x = a(y - k)² + h, where a is the horizontal stretch or compression factor.

x = 14.6 (10.1 - 4.6)² + 4.6

x = (147.47 - 67.16)² + 4.6

x = 80.31)² + 4.6

x = 84.37²

x = 9.2 ft

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Answer:

Step-by-step explanation:

Evaluating the expression gives:

Therefore, the value of the expression is 1536.

∠FGK and ∠FGH are the pairs of non-overlapping angles that share a ray to make a right angle. option C

A right-angle triangle is a triangle that has a side opposite to the right angle the largest side and is referred to as the hypotenuse. The angle of a right angle is always 90 degrees.

In the given figure, we need to find the pairs of non-overlapping angles that share a ray to make a right angle.

We can see that ∠EGF and ∠HGF make a right angle but line FG is overlapping or common in both the angles.

∠FGK and ∠FGH make a right angle and pairs of non-overlapping angles.

So, this is the correct pair for the condition.

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The solution is, the angles of the right triangle are approximately:

A = 12° 33'

B ≈ 1.03°

C ≈ 76° 27'

We are given angle A = 12° 33' and side c = 283 ft. Let's first find angle C using the sine ratio:

sin C = opposite / hypotenuse

sin C = a / c

a = c * sin C

Using a calculator:

sin C = sin(90° - A) ≈ 0.996

a ≈ 282.95 ft

Therefore, we have side a ≈ 282.95 ft. To find the remaining side b, we can use the Pythagorean theorem:

b² = c² - a²

b² = (283 ft)² - (282.95 ft)²

b ≈ 0.79 ft

(Note that we may have some rounding error in the last digit due to using approximate values for a and c, but it should be insignificant.)

Now let's find the angles:

Angle B = 90° - A ≈ 77° 27'

Using the sine ratio again:

sin B = opposite / hypotenuse

sin B = b / c

B ≈ 1.03°

(Note that we may have some rounding error here due to using an approximate value for b, but it should be insignificant compared to the precision of the given angles.)

Therefore, the angles of the right triangle are approximately:

A = 12° 33'

B ≈ 1.03°

C ≈ 76° 27'

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The most appropriate answer would be option a) "Confounding is likely to be a problem in the interpretation of these results."

Now, let's consider the 95% confidence interval (CI) provided as (0.8, 3.8). A confidence interval is a range of values within which the true population parameter (in this case, the risk ratio) is likely to fall. The lower and upper bounds of the confidence interval in this case are 0.8 and 3.8, respectively.

Confounding refers to the presence of an extraneous factor that is associated with both the exposure and the outcome and can distort the observed association.

In this situation, since the confidence interval includes the null value of 1 (i.e., 1 is within the range), it suggests that the observed association may not be statistically significant.

A statistically significant result means that the observed association is unlikely to have occurred due to chance alone.

Therefore, option a) "Confounding is likely to be a problem in the interpretation of these results" is a reasonable conclusion.

Hence the correct option is (a).

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Complete Question:

What can be said about the situation in a cohort study reporting an adjusted risk ratio of 2.5, with a 95% confidence interval of (0.8, 3.8)

a) Confounding is likely to be a problem in the interpretation of these results,

b) This estimate had a P value that was at or below 0.05.

c) There is a clear and strong association between the exposure and the health outcome understudy.

d) None of the above.

The value of x in the equation x - 3(x - 3 + x + 1) = 6(6 + 15) is -24

From the question, we have the following parameters that can be used in our computation:

x-3(x-3+x+1)=6(6+15)

Express properly

So, we have

x - 3(x - 3 + x + 1) = 6(6 + 15)

Evaluate tje like terms

This gives

x - 3(2x - 2) = 126

Open the brackets

x - 6x + 6 = 126

So, we have

-5x = 120

Divide

x = -24

Hence the value of x is -24

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Hello,

kᵃ x kᵇ = kᵃ⁺ᵇ

kᵃ ÷ kᵇ = kᵃ⁻ᵇ

7⁹/7² x 7⁹

= 7⁹⁻² x 7⁹

= 7⁷ x 7⁹

= 7⁷⁺⁹

= 7¹⁶

A variable with equal distances between score units and a true meaningful zero is called a ratio variable.

Ratio variables have the properties of interval variables, meaning that the distances between consecutive values are consistent, and they also have an absolute zero point. The true zero allows for meaningful ratios to be calculated between values. For example, if we have a variable representing weight, a value of 0 indicates the absence of weight, and we can make meaningful statements such as "one object is twice as heavy as another."

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Answer: D

Step-by-step explanation:

If u know that the total is 423, u can narrow the options down. They mention the variables with each food. Substitute and find the answer. Hope it helps!

Answer:

6 + 13i – (7 – 15i)

= 6 + 13i - 7 + 15i (distribute the negative sign)

= -1 + 28i (combine like terms)

Therefore, the answer is -1 + 28i in the form of a + bi.

Step-by-step explanation:

The distance between you and your friend is 61.8 feet.

You let 52 feet of string on your kite. Your friend is standing in an unknown distance from you, with the kite flying on air somewhere between you two. From your friend the angle of elevation is 70 degrees. The angle formed at the kite is 64 degrees.

Therefore, the distance between you and your friend can be calculated as follows:

The situation forms a triangle. The distance between them can be found using sine law.

Hence,

a / sin A = b / sin B = c / sin C

Therefore,

52 / sin 70 = b / sin 64

where

Therefore,

52 / sin 70 = b / sin 64

cross multiply

52 sin 64 = b sin 70

b = 52 sin 64 / sin 70

b = 47.8413539862 / 0.77389068155

b = 61.8175709726

b = 61.8 feet

Therefore,

distance between them = 61.8 feet

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Answer:

A

Step-by-step explanation:

Range = Highest value - Lowest value

At Park Zoo:

R = 44 - 38

= 6

At Countryside Zoo;

R = 45 - 38

= 7

So, it cannot be D, because the ranges are not the same and it cannot be B because the range is greater at countryside zoo

The mode is the value that appears the moat frequently.

At Park zoo, the mode is 41 since it has the most dots.

At Countryside zoo, the mode is 40, since it has the most dots

So, it cannot be C because Park zoo has a greater Mode.

so, the only answer is A

Since the graph of F(x), has the same shape as the graph of G(x) = x³ - x², but it is shifted to the left 1 unit, its equation is: B. F(x) = (x + 1)³ - (x + 1)²

In Mathematics and Geometry, the translation of a graph to the left simply means subtracting a digit from the numerical value on the x-coordinate of the pre-image;

g(x) = f(x + N)

On the other hand, the translation a geometric figure or graph upward simply means adding a digit to the numerical value on the positive y-coordinate (y-axis) of the pre-image; g(x) = f(x) + N.

Based on the information provided, we have the following transformation:

(x, y)                               →                  (x - 1, y)

G(x) = x³ - x²                  →        F(x) = (x + 1)³ - (x + 1)²

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Complete Question:

The graph of F(x), shown below, has the same shape as the graph of G(x) = x³ - x², but it is shifted to the left 1 unit. What is its equation?

F(x) =

OA. F(x) = (x-1)3³ -(x-1)²

B. F(x) = (x + 1)³ - (x + 1)²

C. F(x)=x²-x²-1

O D. F(x)=x²-x²+1

Answer:

gradient = - 2 , y- intercept = 1

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope (gradient) and c the y- intercept )

given

2x + y = 1 ( subtract 2x from both sides )

y = - 2x + 1 ← in slope- intercept form

with gradient m = - 2 and y- intercept c = 1

When x = 8, 26 is the right answer.

We have to given that;

A team in a group trivia game receives 5 points for a right response and -2 points for an incorrect one.

In addition, the game has 15 questions.

Since, We know that;

According to the definition of a mathematical expression, it is a grouping of variables and functions that are created using addition, subtraction, multiplication, and division.

Now, We have find the expression as;

For a team, the correct answer is worth 5 points, and the incorrect response is worth -2 points.

In addition, the game has 15 questions.

Hence, We get;

⇒ 5x - 2 (15 - x)

At x = 8;

⇒ 5 × 8 - 2 (15 - 8)

⇒ 40 - 2 × 7

⇒ 40 - 14

⇒ 26

Thus, The correct solution when x = 8 is,

⇒ 26

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The sum of the given expression from n = 3 to 7 is 241.

The given expression is to be evaluated from n = 3 to 7.  The given expression is,begin{align*}\sum_{n=3}^{7} (n^2 + 2n)\end{align*}Now, we can substitute the values of n and add them up to evaluate the expression. So, the sum of the expression is, \begin{align*}\sum_{n=3}^{7} (n^2 + 2n) &= (3^2 + 2 \cdot 3) + (4^2 + 2 \cdot 4) + (5^2 + 2 \cdot 5) \\&\qquad+ (6^2 + 2 \cdot 6) + (7^2 + 2 \cdot 7)\\&= 9 + 20 + 35 + 72 + 105\\&= \boxed{241}.\end{align*}.

Mathematical statements are called expressions if they have at least two terms that are related by an operator and contain either numbers, variables, or both. Addition, subtraction, multiplication, and division are all possible mathematical operations. As an illustration, the phrase x + y is one where x and y are terms with an addition operator in between. There are two sorts of expressions in mathematics: numerical expressions, which only contain numbers, and algebraic expressions, which also include variables.

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Answer:

23

Also correct 7.32pi

Step-by-step explanation:

Answer: System

Step-by-step explanation:

The question defined a system.

For future reference

Temperature is a measure of the average kinetic energy of molecules

Potential Energy is a measure of how much energy can be turned into kinetic energy (think a ball about to be dropped)

Matter is a term for stuff, everything is made of matter, atoms and molecules

Kinetic energy is energy in motion (think a falling object)

States are the position or form things are in, this is probably going to be used as "states of matter" (solids, liquids, gasses)

Conduction is the transfer of heat or electricity through two objects touching

Energy is "the ability to do work" think of energy like a general term for potential and kinetic energy, undefined if you ill

Hope this helps