When Sally was 10 years old, she was 140 cm tall. Two years later, her height had increased by 10%. Find Sally's height when she was 12 years old.

There is a missing step between step 8 and 9 because the student did not state that m∠BOC + m∠COD = m∠BOD. This statement is true because of the angles addition postulate.

The Angle Addition Postulate states that if point P lies in the interior of angle ∠RST, then the measure of ∠RST is equal to the sum of the measures of ∠RSP and ∠PST. In other words, for any angle ∠RST with point P in its interior, says that m∠RST = m∠RSP + m∠PST.

The Angle Addition Postulate is used in geometry to find the measures of angles that are formed by two intersecting lines or when a point is located in the interior of an angle.

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Image transcribed:

Select the correct answer from each drop-down menu.

Given: ∠BOC and ∠COD are complementary angles

lines BO intersects lines AD at point O

Prove: ∠AOB ≅∠BOD

Statements--|--Reasons

1. ∠BOC and ∠COD are complementary angles; BO intersects AD at point O--|--1. given

2. m∠BOC+ m∠COD = 90°--|--2. definition of complementary angles

3. substitution property of equality--|--3. m∠BOD 90°

4. ∠AOB and ∠BOD are supplementary angles--|--4. linear pair theorem

5. m∠AOB + m∠BOD = 180°--|--5. definition of supplementary angles

6. m∠AOB+90° = 180°--|--6. substitution property of equality

7. m∠AOB = 90°--|--7. subtraction property of equality

8. m∠AOB = m/BOD--|--8. substitution property of equality

9. ∠AOB∠ BOD--|--9. definition of congruent angles

There is a step missing in the proof. Identify where in the proof there is a missing step and what this step should be.

There is a missing step between _______ (options 8. and 9.,1. and 2., 2 and 3., 4. and 6.)because the student did not state m∠BOC+m∠COD - m∠______  (options AOB or BOD). This statement is true because of the _____ (options angles addition postulate, d definition of complementary angles, addition, property of equality, definition of perpendicular line segments)

Using the formula for lines intersecting in a circle, we get the value of x to be = 32.5cm.

A diameter is a line segment that traverses a circle by going through its centre.

The radius is twice as long as the diameter.  A chord is a segment that does not have to pass through the centre and has endpoints on the circle.

We know that in a circle when lines are intersecting each other than the lines divided are in the formula:

a × b = c × d

Here,

13 × 20 = 8 × x

⇒ x = 260/8

⇒ x = 32.5cm.

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Answer:

Step-by-step explanation:

[tex]P+Q-R=(2x^2+3xy-5y^2)+(-5x^2+2xy+3y^2)-(-3x^2+5xy-2y^2)[/tex]

                  [tex]=2x^2+3xy-5y^2-5x^2+2xy+3y^2+3x^2-5xy+2y^2[/tex]

                  [tex]=2x^2-5x^2+3x^2-5y^2+3y^2+2y^2+3xy+2xy-5xy[/tex]

                  [tex]=0[/tex]

Answer:

To show that P + Q - R = 0, we need to substitute the expressions for P, Q, and R into the equation and simplify.

P + Q - R = (2x² + 3xy - 5y²) + (-5x² + 2xy + 3y²) - (-3x² + 5xy - 2y²)

Simplifying the brackets on the right-hand side:

P + Q - R = 2x² + 3xy - 5y² - 5x² + 2xy + 3y² + 3x² - 5xy + 2y²

Grouping like terms together:

P + Q - R = (2x² - 5x² + 3x²) + (3xy + 2xy - 5xy) + (-5y² + 3y² + 2y²)

Simplifying the expressions in the brackets:

P + Q - R = 0x² + 0xy + 0y²

Therefore, P + Q - R = 0.

It should be noted that cpnsidering that when x = 1, y = 0, it is found that the inverse trigonometric function depicted in the graph is given by: A. y = Arccos x

It has the format y = f(x), with f being an inverse trigonometric function, and it basically is what angle y has a trigonometric function value of x.

In this graph, we have that when x = 1, y = 0, and considering that cos(0) = 1, the inverse trigonometric function depicted in the graph is given by y = Arccos x

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Answer:

220.8

Step-by-step explanation:

4/5 × (12 × 1/3) × 69

4/5 × (4) × 69

3.2 × 69

= 220.8

Answer:

8 mi per in.

Step-by-step explanation:

Divide 24 mi by 3 in. to get base number of 1 in. per x mi

24/3 = 8

8 mi per in.

Answer:

Yes, (x - 4) is a factor of polynomial function P(x) = x⁵ + 4x⁴ - 17x³ - 60x².

Step-by-step explanation:

The Factor Theorem states that if f(x) is a polynomial, and f(a) = 0, then (x - a) is a factor of f(x).

Therefore, according to the Factor Theorem, if (x - 4) is a factor of P(x) then P(4) = 0.

To determine if (x - 4) is a factor of P(x), substitute x = 4 into the function and solve.

[tex]\begin{aligned}x=4 \implies P(4)&=(4)^5+4(4)^4-17(4)^3-60(4)^2\\&=1024+4(256)-17(64)-60(16)\\&=1024+1024-1088-960\\&=2048-1088-960\\&=960-960\\&=0\end{aligned}[/tex]

As P(4) = 0, this confirms that (x - 4) is a factor of polynomial function P(x) = x⁵ + 4x⁴ - 17x³ - 60x².

[tex]\hrulefill[/tex]

Additional comments

The fully factored form of the given polynomial function is:

[tex]P(x)=x^2\left(x+3\right)\left(x-4\right)\left(x+5\right)[/tex]

By pythagorean theorem, 21.095 is the length of the segment indicated..

What is the Pythagorean theorem in plain English?

The Pythagorean Theorem states that the squares on the hypotenuse of a right triangle, which is the side that faces the right angle, are equal when added together. This is written as a2 + b2 = c2 in the usual algebraic notation.

  In triangle we apply pythagorean theorem

    x² = 11.8² + 17.5²

         = 139.24 +  306.25

     x   = √445.49

      x = 21.095

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The area of the archway is (π + 24) square meters, as the total area of the two rectangular pillars is 24 square meters, area of semicircle is (9π) / 2 square meters.

Radius is a term used in geometry to refer to the distance from the center of a circle or sphere to its edge. It is usually represented by the symbol "r". In a circle, all points on the edge, also called the circumference, are at the same distance from the center. This distance is equal to the radius. The radius is half the length of the diameter, which is the distance across the circle passing through its center.

To determine the area of the archway, we need to calculate the area of the two rectangular pillars and the semicircle top arch, and then add them together.

The area of each rectangular pillar is:

Area of each pillar = length x width

= 4 meters x 3 meters

= 12 square meters

So the total area of the two rectangular pillars is:

Total area of pillars = 2 x 12 square meters

= 24 square meters

Now we need to calculate the area of the semicircle top arch. The radius of the semicircle is half of the distance between the two pillars, which is:

Radius of semicircle = (6 meters / 2) = 3 meters

The area of the semicircle is:

Area of semicircle = (π x r²) / 2

= (π x 3²) / 2

= (9π) / 2 square meters

We also need to subtract the area of the rectangle sections at the top of each pillar from the semicircle to get the area of the archway. Each of these rectangles has a length of 3 meters and a height of the difference between the radius of the semicircle and the height of the pillars, which is:

Height of rectangle = (3 meters - 4 meters) = -1 meter

Since we can't have a negative height, we take the absolute value of this difference:

|Height of rectangle| = 1 meter

The area of each rectangle is:

Area of each rectangle = length x width

= 3 meters x 1 meter

= 3 square meters

So the total area of the two rectangles is:

Total area of rectangles = 2 x 3 square meters

= 6 square meters

Therefore, the area of the archway is:

Area of archway = Area of pillars + Area of semicircle - Area of rectangles

= 24 square meters + (9π) / 2 square meters - 6 square meters

= (π + 24) square meters

Hence, the area of the archway is (π + 24) square meters.

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Let u = tan⁻¹x, then du/dx = 1/(1+x²).

Using the formula for the derivative of inverse tangent, we have:

tan(u) = x

sec²(u) du/dx = 1

du/dx = cos²(u)

Substituting into the original expression, we get:

∫(tan⁻¹x × e^tan⁻¹x)/(1+x²) dx = ∫(tan⁻¹x × e^u × cos²(u)) du

Using integration by parts with u = tan⁻¹x and dv = e^u × cos²(u) du, we get:

v = (1/2) e^u (sin(u) + u cos(u))

∫(tan⁻¹x × e^u × cos²(u)) du = (1/2) e^u (sin(u) + u cos(u)) tan⁻¹x - ∫[(sin(u) + u cos(u)) / (1+x²)] dx

Substituting back u = tan⁻¹x, we get:

∫(tan⁻¹x × e^tan⁻¹x × cos²(tan⁻¹x)) dx = (1/2) e^tan⁻¹x (x sin(tan⁻¹x) + cos(tan⁻¹x)) tan⁻¹x - ∫[(x cos(tan⁻¹x) + sin(tan⁻¹x)) / (1+x²)] dx

Using the identity sin(tan⁻¹x) = x / √(1+x²) and cos(tan⁻¹x) = 1 / √(1+x²), we simplify the expression to:

∫(tan⁻¹x × e^tan⁻¹x × cos²(tan⁻¹x)) dx = (1/2) x e^tan⁻¹x + (1/2) ∫[e^tan⁻¹x / (1+x²)] dx

The remaining integral can be solved using another substitution with v = tan⁻¹x, which results in:

∫(tan⁻¹x × e^tan⁻¹x × cos²(tan⁻¹x)) dx = (1/2) x e^tan⁻¹x + (1/2) ln(1+x²) + C, where C is the constant of integration

The function based on the given parent function and transformations in the given order would be:

f(x)= -1/2√(x+2)

Functions are often represented as equations, graphs, or tables, and they are used to model a wide range of real-world phenomena. For example, a function might describe the relationship between the time of day and the temperature outside, or the amount of money earned based on the number of hours worked.

Let's break down how each transformation affects the parent function:

Shifting units to the left: This transformation involves replacing the variable "x" with "x+2" in the parent function. This has the effect of shifting the graph 2 units to the left. The function becomes:

f(x)= √(x+2)

Stretching horizontally: This transformation involves replacing "x" with "2x" in the function obtained after the first transformation. This has the effect of stretching the graph horizontally by a factor of 1/2. The function becomes:

f(x)= √(2x+4)

Reflecting across the x-axis: This transformation involves multiplying the entire function by -1. This has the effect of reflecting the graph across the x-axis. The function becomes:

f(x)= -√(2x+4)

So the final function based on the given parent function and transformations in the given order is:

f(x)= -1/2√(x+2)

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Answer:

Step-by-step explanation:

The answer of the given question based on function is  g(t) = 1.7 * 0.8^t models exponential decay.

Exponential decay is a type of mathematical function that represents a process in which the value of a quantity decreases over time or through a series of events at a constant proportional rate. In exponential decay, the rate of decrease is proportional to the current value of the quantity.

Exponential decay is often modeled by the following equation:

y = a * e^(-kt)

The function g(t) = 1.7 * 0.8^t models exponential decay.

In this function, the base of the exponent is 0.8, which is a number between 0 and 1. When a base of an exponential function is between 0 and 1, it represents exponential decay. This means that as the value of t increases, the value of g(t) decreases at an increasingly rapid rate.

Additionally, the coefficient of the exponent (1.7 in this case) represents the initial value of the function. Since the coefficient is positive, the initial value is also positive. Therefore, the function represents exponential decay from a positive initial value.

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Therefore, the combined area of the living room and hallway is 731 square feet.

In geometry, the term "area" refers to the measurement of the size of a two-dimensional surface. It is typically measured in square units, such as square meters or square feet. The area of a shape can be found by multiplying its length by its width or by using other specific formulas that depend on the shape itself. Some common examples of shapes for which we might want to calculate the area include squares, rectangles, triangles, circles, and irregular polygons.

by the question.

The area of the living room can be calculated as:

[tex]Area of living room = length x width\\Area of living room = a x b\\Area of living room = 34 ft x 13 ft\\Area of living room = 442 sq ft[/tex]

The area of the hallway can also be calculated using the same formula:

[tex]Area of hallway = length x width\\Area of hallway = c x d\\Area of hallway = 17 ft x 17 ft\\Area of hallway = 289 sq ft[/tex]

To find the total area of the living room and hallway together, we simply add the two areas:

[tex]Total area = Area of living room + Area of hallway\\Total area = 442 sq ft + 289 sq ft\\Total area = 731 sq ft[/tex]

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f(x) = (3/2)*x² + (13/2)*x - 5/2 - 6/(x + 3) + 15/(x - 5)

and the values of P = 3/2, Q = 13/2, R = -5/2, V = -6, W = 15

What is the fraction?

A fraction is a number that represents a part of a whole or a ratio between two quantities. It is written with a numerator (the top number) and a denominator (the bottom number) separated by a horizontal line. The numerator represents the number of parts being considered, while the denominator represents the total number of parts that make up a whole unit.

First, let's factor in the denominator of the given function:

x² - 2x - 15 = (x - 5)(x + 3)

Now we can use partial fraction decomposition to express the given function as the sum of simpler fractions:

f(x) = (x⁴ + 2x³ - 29x² - 47x + 77) / (x² - 2x - 15)

= (x⁴ + 2x³ - 29x² - 47x + 77) / ((x - 5)(x + 3))

= (Px² + Qx + R) + V/(x + 3) + W/(x - 5)

where P, Q, and R are constants to be determined, and V and W are constants to be determined as well.

To find the values of P, Q, and R, we can use polynomial long division to divide the numerator by the denominator:

        x² + 5x - 2

x² - 2x - 15 | x⁴ + 2x³ - 29x² - 47x + 77

- (x⁴ - 2x³ - 15x²)

----------------------

4x³ - 14x² - 47x

- (4x³ - 8x² - 60x)

------------------

-6x² + 47x

- (-6x² + 12x + 90)

--------------

35x - 90

Therefore,

f(x) = (x⁴ + 2x³ - 29x² - 47x + 77) / (x² - 2x - 15)

= x² + 5x - 2 - (6x² - 35x + 90) / ((x - 5)(x + 3))

= -5/2 + (13/2)x + (3/2)x² + V/(x + 3) + W/(x - 5)

Comparing this to the given form, we can see that:

P = 3/2

Q = 13/2

R = -5/2

V = -6

W = 15

Therefore, we have:

f(x) = (3/2)*x² + (13/2)*x - 5/2 - 6/(x + 3) + 15/(x - 5)

and the values of P = 3/2, Q = 13/2, R = -5/2, V = -6, W = 15

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As a result, the expression can be expressed in the following standard form: -32 sin(102) + 32i cos = 32i (cos(102) + I sin(102)) (102).

In mathematics, programming, or other subjects, an expression is typically a grouping of numbers, symbols, and operators that denotes a value or computation. When used to indicate a mathematical relationship or formula, an expression in mathematics can be made up of a number of different variables, operators, and digits. For instance, the statement 3x + 2y denotes a linear equation. A combination of variables, constants, operators, and functions can make up an expression in programming, which can then be evaluated to create a value. For instance, the expression 5 + 3 evaluates to 8 as an expression.

given

First, we can use De Moivre's theorem to simplify the expression:

(cis(22.5+67.5)) = (cis(22.5+67.5)) = cis(22.5+90) = I

We then have:

Cos(12) + I sin(12) = 32cis (12)

When we multiply these two outcomes, we obtain:

32i cis(90+12) = 32i cis(i * 32cis(12)) = 32i cis102

Thus, the phrase can be worded as follows:

(cis22.5) (5cis67.5) (5cis67.5) 32(cos (12) + I sin (12)) = 32i cis (102).

Using Euler's formula, cis102 can be written as follows:

102 + I sin + cos(102) = cis102 (102)

As a result, the expression can be expressed in the following standard form: -32 sin(102) + 32i cos = 32i (cos(102) + I sin(102)) (102)

The final response is thus: Z = 32i cos + 32sin(102) (102)

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Option (D) 15.5 units²

Number of clear squares = 9 = 9 squares

Number of half squares = 7 = 3.5 squares

Number of more than half squares = 1 = 1 squares

Number of less than half squares = 8 = 2 squares

Grand total = 9 + 3.5 + 1 + 2

                    = 15.5 units²

Please mark my answer as the BRAINLIEST. Plssssssss

3+26+28 = 57

chance of gold is 3/57

chance of silver = 26/57

chance of black = 28/57

the expected value of playing this game = a weighted average of the winnings (or losses) multiplied by the odds of winning: (3/57)3  +  (26/57)2 + (28/57)(-1) = 9/57 + 54/57 - 58/57 = 60/57 -58/17 = 2/57 = about 0.578 winnings = $0.578 = 0.58 cents

You will win 0.58 cents each time you play this game, on average.

but the mode is on black.  You're more likely to lose (28/57)(-1) about 0.49 cents on your first time to play

but if you stick it out, and play enough times, you'll average 0.58 cents a game

Answer:

0.05328358208955223880597014925373

Step-by-step explanation:

Answer:1,777...)-(1,555)= B)1,333...+4,666

Step-by-step explanation:1,777...)-(1,555)= B)1,333...+4,666

The rate at which the amount of water in the tank is changing is -0.5 gallons/minute. This means that the amount of water in the tank is decreasing at a rate of 0.5 gallons per minute.

The rate of change is a measure of how a quantity changes with respect to another quantity. It tells us how much a particular quantity is changing for a given change in another quantity.

It is often represented as a ratio of the change in the quantity of interest to the change in the other quantity, usually with units of measurement.

Here we have

Ms. Grimes walks up to a tank of water that can hold up to 12 gallons.

When it is active, a drain empties water from the tank at a constant rate. When Jada first sees the tank it contains 8 gallons of water. Four minutes later the tank contains 6 gallons of water.

We can use the following formula for the rate of change of a quantity:

Rate of change = (change in quantity) / (change in time)

Given that when Jada first saw the tank, 8 gallons. Four minutes later, the amount of water in the tank decreased to  6 gallons.

So the change in the amount of water in the tank is:

change in water = 6 gallons - 8 gallons = -2 gallons

The change in time is:

change in t = 4 minutes - 0 minutes = 4 minutes

So, the rate of change of the amount of water in the tank is:

= (change in W) / (change in t)

= (-2 gallons) / (4 minutes) = -0.5 gallons/minute

Therefore,

The rate at which the amount of water in the tank is changing is -0.5 gallons/minute. This means that the amount of water in the tank is decreasing at a rate of 0.5 gallons per minute.

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Answer:

Step-by-step explanation:

SOHCAHTOA    [tex]sin =\frac{opp}{hyp} ,cos=\frac{adj}{hyp} ,tan=\frac{opp}{adj}[/tex]

[tex]sin60=\frac{x}{8}[/tex]

[tex]x=8sin60=8\frac{\sqrt{3} }{2} =4\sqrt{3}[/tex]

The width and length of the rectangle will be -1 units and 3 units, respectively.

Let W be the rectangle's width and L its length.

The area of the rectangle is the multiplication of the two different sides of the rectangle. Then the rectangle's area will be

[tex]\text{Area of the rectangle = L x W square units}[/tex]

The width of a square shape is 4 units less than the length. The region of the square shape is 12 square units. Then the equations are given below.

[tex]W = L - 4[/tex]              ...1

[tex]L \times W = 12[/tex]           ...2

From equations 1 and 2, then we have

[tex]L \times (L - 4) = 12[/tex]

[tex]L^2 - 4L = 12[/tex]

[tex]L^2 - 4L - 12 = 0[/tex]

[tex]L^2 - 3L + 4L - 12 = 0[/tex]

[tex]L(L - 3) + 4(L - 3) = 0[/tex]

[tex](L - 3)(L + 4) = 0[/tex]

[tex]L = 3, -4[/tex]

Then the width of the rectangle is given as,

[tex]W = 3 - 4[/tex]

[tex]W = -1 \ \text{units}[/tex]

The width and length of the rectangular shape will be -1 units and 3 units, separately.

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Answer:

The answer is 3

Step-by-step explanation:

20% of 15 can be written as 20% × 15

= 20/100 × 15

= 3

Thus, 20% of 15 is 3.

hope this helps

Answer: 14ex

Step-by-step explanation:

Answer: 44

Step-by-step explanation: So, if the area of a square is 121 sq. in, the sides that could be multiplied to get 121 are 11 x 11. Then, you multiply by four to get the perimeter.

Answer:

Step-by-step explanation:

The tree that shows the correct combination of one flavor of ice cream and one topping is the the first tree.

What is tree diagram ?

A tree diagram is a tool in the fields of general mathematics, probability, and statistics that helps calculate the number of possible outcomes of an event or problem, and to cite those potential outcomes in an organized way.

Tree diagrams, also known as probability trees or decision trees, are quite versatile and may be useful in many fields, including finance.

A tree diagram lets a user start at a single point and make mutually exclusive decisions or experience mutually exclusive events to follow a path down the branches of the tree. Using a tree diagram is simple once you assign the appropriate values to each node.

From the question, and the definition it is clear that vanilla splits into fudge and caramel and chocolate to sprinkles.

Hence A is the correct option.

Answer:

-----------------------------------

The scale factor k affects the points with the rule:

Apply the rule to the given points, given k = 1/2:

The numbers which replaces the capital letters are A is -1, B is 1, C is 3, D is 0, E is 5 and F is -2.

A logarithm is a mathematical function that measures the relationship between two quantities, by expressing one quantity in terms of another. More specifically, a logarithm is the power to which a base must be raised to produce a given number.

a) [tex]2^(A) * 2^(B) = 2^0[/tex] can be rewritten as [tex]2^(A+B) = 2^0[/tex].

To find the values of A and B, we need to solve the equation [tex]2^(A+B) = 2^0\\[/tex].

Since [tex]2^0[/tex] = 1, we have [tex]2^(A+B)[/tex] = 1, which means A + B = 0. One possible solution is A = -1 and B = 1, since (-1) + 1 = 0.

Therefore, the equation becomes [tex]2^(-1) * 2^1 = 2^0[/tex], which is true.

(A) = -1

(B) = 1

b) [tex](2^3)/(2^(C)) = 2^(D)[/tex] can be simplified as [tex]2^(3-C) = 2^(D)[/tex].

To find the values of C and D, we need to set the exponents equal to each other. So, we have 3 - C = D, which means C = 3 - D.

One possible solution is C = 3 and D = 0, since 3 - 0 = 3.

Therefore, the equation becomes [tex](2^3)/(2^3) = 2^0[/tex], which is true.

(C) = 3

(D) = 0

c) [tex]2^(-3) * (E)^(-3) = 10^(F)[/tex] can be rewritten as [tex](1/2^3) * (1/E^3) = 10^F[/tex]. Multiplying both sides by [tex]2^3 * E^3[/tex], we get [tex]1 = 10^F * 2^3 * E^3[/tex].

Taking the logarithm of both sides, we get log(1) = [tex]log(10^F * 2^3 * E^3)[/tex]. Since log(1) = 0, we have 0 = F log(10) + 3log(2) + 3log(E), which simplifies to F = -2 - 3log(E)/log(10) with one possible solution of E = 5 and F = -2. Therefore, the equation becomes [tex]2^(-3) * 5^(-3) = 10^(-2)[/tex], which is true.

(E) = 5

(F) = -2

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