Exercie 4 An IQ tet wa adminitered to a random ample of 101 ixth grader. The ample mean wa 104. 2 with a tandard deviation of 12. Find a 99% confidence interval

Answer:

x = -4

y = -1

Step-by-step explanation:

-5x+12y=8

2x-8y=0

We multiply the first equation by 2 and the second equation by 5

-10x + 24y = 16

10x - 40y = 0

-16y = 16

y = -1

Now put -1 back in for y and solve for x

-5x + 12(-1) = 8

-5x - 12 = 8

-5x = 20

x = -4

Let's check

-5(-4) + 12(-1) = 8

20 - 12 = 8

8 = 8

So, x = -4 & y = -1 is the correct answer.

A real image is an image that is formed by the actual convergence of light rays, it can be projected onto a surface, located in the front or behind the lens, and can be inverted or upright depending on the properties of the lens or mirror used to form the image.

A real image is an image that is formed by the actual convergence of light rays. Real images can be projected onto a surface, such as a screen or a wall, and can be captured by a camera or viewed directly by an observer.

Real images can be produced by both converging and diverging lenses and can be located either in front of or behind the lens or mirror that forms them.

In the case of a converging lens, real images are located on the same side of the lens as the object, whereas in the case of a diverging lens, real images are located on the opposite side of the lens as the object.

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Answer:

C=2πr

Step-by-step explanation:

C=2[tex]\pi r[/tex]

(this might be a little hard to read so I’m gonna explain by saying c = 2 pi r)

The quadratic equation that describe the speed of Raj's car is c) x² + 5x - 500 = 0

speed of raj car = x km/h .

speed of ajay car = 5 km faster than speed of raj car = (x + 5) km/h .

Distance cover by ajay in 2 hours = 2(x + 5) km

time taken by raj to cover 400 km = D/S = (400/x) hours .

time taken by ajay to cover 400km = D/S = 400/(x + 5) hours .

A/q,

400/x - 400/(x + 5) = 4

400{1/x - 1/(x + 5)} = 4(x + 5 - x)/x(x + 5) = 1/100

x² + 5x = 5 * 100

x² + 5x - 500 = 0

In this case, it should be noted that the concept that was Illustrated here is the concept of quadratic equations.

Therefore, based on the calculation above, the correct option is C.

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Complete question

Which of the following quadratic equation describe the speed of Raj's car?

a) x² - 5 X - 500 = 0

b) x² + 4x - 400 = 0

c) x² + 5x - 500 = 0

d) x² - 4x + 400 = 0

The equation that represents the relationship between the number of apples a and the number of pears p is b. a = p + 3.

An equation simply has to do with the statement that illustrates the variables given. In this case, it is vital to note that two or more components are considered in order to be able to describe the scenario.

From the information, in each basket of fruit, there are 3 more apples than pears.

Let p = pears

Let a = apple

Therefore, the equation that represents the relationship between the number of apples a and the number of pears p is a = p + 3.

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To change the weight of kilograms into pounds, multiply the weight in kilograms by 2.2

According to the conversion systems, 1 kg = 2.2046 lbs

To facilitate conversion on a pen-paper basis we cannot use 2.2046 whole.

Hence we generally consider 1 k = 2.2 pounds.

The symbol for pounds is lbs and for kilograms is kg.

Now, 1 kg is 2.2 lbs

2 kg = 1 kg + 1 kg

= 2.2 lbs + 2.2 lbs

= 4.4lbs = 2 X 2.2

3 kg = 1 kg + 2 kg

= 2.2 lbs + 4.4 lbs

= 6.6 lbs. = 3 X 2.2

Hence we can see that for all these numbers we can multiply 2.2 to the given weight in kg to get the pounds form.

Hence we need to multiply 2.2

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The question which can be answered by finding 4½ ÷ ¼ is "You are buying ¼ pound containers of fruit at the store. How many containers do you need to buy to have 4½ pounds of truit?".

The correct answer choice is option C

You have 4½ pounds of fruit and use ¼ pound. How much fruit is remaining

Pounds of fruits remaining = Pounds of fruits you have - pounds of fruits used

= 4½ - ¼

= 9/2 - 1/4

= (18-1)/4

= 17/4 pounds

How much is ¼ of 4½ pounds of fruit?

= ¼ × 4½

= ¼ × 9/4

= 9/16 pounds of fruits

You are buying ¼ pound containers of fruit at the store. How many containers do you need to buy to have 4½ pounds of truit?

Number of containers needed = 4½ ÷ ¼

= 9/2 ÷ 1/4

multiply by the reciprocal of 1/4

= 9/2 × 4/1

= 36/2

= 18 containers

Hence, The question which represents 4½ ÷ ¼ is "You are buying ¼ pound containers of fruit at the store. How many containers do you need to buy to have 4½ pounds of truit?".

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If a function yields the result y, then its inverse function, denoted by the symbol , will return the value x.

A function's output is returned when its inverse function does the same action variable. The inverse function of a function, or f-1(y), will return the value x if the function f(x) produces the output y.A function that reverses the action of a function, or f, is known as its inverse in mathematics.

Here,

A function that reverses the effects of another function is said to have an inverse. If y = f(x), then x must always equal g, then a function g is the inverse of a function f. (y). Application of f followed by application of g is equivalent to doing nothing, in other words. As g(f(x)) = x, this can be expressed in terms of the relationship between f and g.

Because they allow for the reversal of mathematical operations, inverse procedures are crucial for solving equations (e.g. logarithms, the inverses of exponential functions, are used to solve exponential equations). How to invert a mathematical technique is one of the most crucial questions whenever one is introduced.

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The complete question : " In Exercises 15-18, match the graph of the function with the graph of its inverse function. [The graphs of the inverse functions are labeled (a), (b), (c), and (d).]"

On solving the provided question, we can say that in right angled triangle the value of x = 5√3 and value of y = 10.

A triangle is a polygon since it has three sides and three vertices. It is one of the basic geometric shapes. The name given to a triangle containing the vertices A, B, and C is Triangle ABC. A unique plane and triangle in Euclidean geometry are discovered when the three points are not collinear. Three sides and three corners define a triangle as a polygon. The triangle's corners are defined as the locations where the three sides converge. 180 degrees is the result of multiplying three triangle angles.

Using the table of trig values, we find that

sin30°=1/2

So, this gives us:

1/2 = sin 30° = 5/y

1/2 = 5/y

(1xy)/2 = 5

y= 2×5 =10

Next, using the Pythagorean Theorem, we find that

5²+x²=10²

x²=100−25=75

Solve for x:

x=√75=√3×25=5√3

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The formula for the midpoint Riemann sum is: (b-a)/(2n) × [f(x1)+f(x2)+f(x3)+...+f(xn)] where xi = a+i(b-a)/n ( i = 1 to n)

The midpoint Riemann sum formula is a method of approximating the definite integral of a function over a given interval [a,b].

It involves dividing the interval into n subintervals of equal width, and for each subinterval, taking the midpoint of the subinterval as the x-coordinate and the function value at that point as the y-coordinate.

The sum of the areas of rectangles formed by these coordinates and the subinterval widths is then used as an approximation for the definite integral.

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Therefore , the solution to the given problem of function comes out to be the drone and toy rocket are at the same 20-foot height there.

Variables and their variations, formulas and related structures, locations of forms and forms themselves are all included in the field of mathematics. The term "function" describes the connection between a group of inputs, of which each has a corresponding output. A function is an association between outputs and inputs where equation results in a single, unique output. A realm and a made the request, or scope, are assigned to each function. Functions are typically denoted by the letter f. (x). The entry is an x. On activities, one-to-one functions, many-to-one features, within features, and on functions are the four basic categories of functions that are available.

Here,

R(2)>D(2) is true because, on the graph, R = 45 and D = 20 when time is 2 seconds.

The drone has a 20-foot height.

R=0 at 5 seconds is where that is. D=20 at 5 seconds,

t=4.25 at R(t)=D (t).

The drone and toy rocket are at the same 20-foot height there.

Therefore , the solution to the given problem of function comes out to be the drone and toy rocket are at the same 20-foot height there.

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The four primary methods of factoring of polynomial are the Grouping method, the Difference in Two Squares, the Sum or Difference in Cubes, and the Greatest Common Factor (GCF).

A mathematical expression made up of coefficients and uncertainty that only makes use of additions, subtractions, multiplications, and positive integer powers of variables is known as a polynomial. The formula x2 4x + 7 denotes a single indeterminate x polynomial. An expression in mathematics known as a polynomial is made up of variables (also known as indeterminates) and coefficients that may be added, subtracted, multiplied, and raised to negative integer powers of non-variables. An algebraic statement with variables and coefficients is called a polynomial. An expression can only contain the operations addition, subtraction, multiplication, and non-negative integer exponents. Polynomials are the name for these expressions.

The four primary methods of factoring are the Grouping method, the Difference in Two Squares, the Sum or Difference in Cubes, and the Greatest Common Factor (GCF).

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Step-by-step explanation:

-4x+2=-14

-2 -2

-4x=-16

÷-4 ÷-4

X=4

-4(4)+2=-14

-16+2=14

-14=-14

Answer:

Step-by-step explanation: -4x + 2 = -14                                                                        

The exponential form of 64 is 2^6.

Algebra has many rules, but one of the most fundamental rules is the distributive property. The distributive property states that for any real numbers a, b, and c, the following equation holds true:

a(b + c) = ab + ac

This property allows us to "distribute" a common factor across the sum of two or more terms. For example, using the distributive property, we can simplify the expression 2(x + 3) to 2x + 6.

Another important rule in algebra is the order of operations, also known as PEMDAS ( Parentheses, Exponents, Multiplication and Division, Addition and Subtraction). This rule tells us the order in which we should perform mathematical operations to get the correct answer.

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The distance between the two points rounding to the nearest tenth is 6.7 units.

In the field of mathematics known as graph theory, the number of edges in the shortest path (also known as a graph geodesic) connecting two vertices in a graph is the distance between them. This distance is also referred to as the geodesic or shortest-path distance.

It should be noted that there may be more than one shortest path between any two vertices. Traditionally, the distance is thought of as infinite if there is no path connecting the two vertices, or if they are a part of different connected components.

If at least one such arc-based directed path exists, the distance d(u,v) between two vertices u and v in a directed graph is defined as the length of that path.

The distance between two point's formula is

[tex]$ \sqrt{(\text x_2 - \text x_1)+(\text y_2 -\text y_1)}[/tex]

Putting the values in formula we get

= [tex]\sqrt{( -3 - (-9))^2+(4 -1)^2}[/tex]

= [tex]3\sqrt{5}[/tex]

= 6.7

Thus, the distance between the two points rounding to the nearest tenth is 6.7 units.

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Answer:

Step-by-step explanation:

I would help you but i can't read it.

To find out how much money you would save on car 1, you would multiply the sticker price by the discount percentage (expressed as a decimal). In this case, that would be $20,000.00 x 0.23 = $4,600.00. So you would save $4,600.00 on car 1.

To find out how much money you would save on car 2, you would multiply the sticker price by the discount percentage (expressed as a decimal). In this case, that would be $17,000.00 x 0.10 = $1,700.00. So you would save $1,700.00 on car 2.

Based on the calculations, Car 1 would be a better deal. Even though Car 2 is cheaper by $3,000.00 before discount, Car 1 saves more on discount of $4,600.00 compared to Car 2's $1,700.00. So Car 1 would be more affordable overall.

The quadratic equation whose roots -3 and 6 and leading coefficient 4 is 4x²-12x-72 = 0

A quadratic equation is an equation of degree 2, meaning that the highest exponent of this function is 2. The standard form of a quadratic is y = ax^2 + bx + c, where a, b, and c are numbers and a cannot be 0. Examples of quadratic equations include all of these: y = x² + 3x + 1 , y = x²+x-1

If the root of the quadratic equation are -3 and 6

then, x = -3 and x= 6

therefore x+3 = 0 and (x-6) = 0

(x+3)(x-6) = 0

with leading coefficient 4,

then 4( x+3) ( x-6) = 0

4 ( x²-6x+3x-18) = 0

4( x²-3x-18) = 0

open the parentheses,

4x²-12x-72 = 0

Therefore, the quadratic equation with root -3 and 6 and leading coefficient 4 is 4x²-12x-72 = 0

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In particular, you can do this and it is beneficial to do so, a table within a form, or vice versa.

The length of the sequence is the number of ordered elements (potentially infinite). You should be familiar with the following four main categories of sequences: arithmetic sequences, geometric sequences, quadratic sequences, and special sequences. A set of numbers connected by a rule is referred to as a number sequence. You can determine the following numbers in the sequence if you figure out the rule. In this instance, there is a difference of 6 between each number.

given

In particular, you can do this and it is frequently beneficial to do so, a table within a form, or vice versa.

Nevertheless, you must be aware of your actions. Any way allows for nesting of tables and forms.

However, if you insert forms into tables, you must fully include each form in a single table cell (one TD element in practice).

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Answer:

47 is a prime number because it has only two factors, 1 and 47.

Step-by-step explanation:

Your welcome.

Answer: A prime number is a number that can only be divided evenly by 1 and itself. 47 is a prime number because it can only be divided evenly by 1 and 47. It cannot be divided evenly by any other number. That's why we say 47 is a prime number. ✅

PLEASE MAKE THIS A BRANLIEST ANSWER!!!

Answer: The formula for the future value of an account earning interest compounded continuously is given by:

FV = P * e^(rt)

Where:

FV = future value of the account

P = principal or initial deposit

r = annual interest rate as a decimal

t = number of years the account earns interest

In this case:

FV = $550 * e^(0.066*10)

FV = $550 * e^0.66

The future value of the account is $984.96

So, the answer is $984.96

It's worth noting that the result is the future value of the investment, it doesn't take into account any withdrawal or addition of funds. If any of these occurs the final value will be different.

Step-by-step explanation:

Answer:

$984.96

You can use the formula for continuously compounded interest: A = P * e^(rt) where A is the final balance, P is the principal, r is the interest rate (as a decimal), and t is the time in years.

Plugging in the given values:

A = 550 * e^(0.066 * 10)

A = 550 * e^(0.66)

A = 550 * 2.92469798

A = $984.96

Answer:

any number raised by power 0 is always one

ie 10000000000^0 = 1

99999999^0 =1

23^0 = 1

Answer:

Yes. If x=0, then 2ˣ = 0

Step-by-step explanation:

I presume you mean 2ˣ

Any number raised to the power zero is 1 so if x = 0, 2⁰ = 1. There are debates about what 0⁰ evaluates to but I don' think you need to worry about that for this question

I hope I interpreted your question correctly.

Answer: 5.

Step-by-step explanation: The .57 doesn't matter so we can remove that.

Multiply 32 by 0.15

32 x 0.15 = 4.8

After you get your result, round it to the nearest tenths.

4.8 = 5

hope this helps

The answer is 24

Supplementary angles are those angles that sum up to 180 degrees. For example, angle 130° and angle 50° are supplementary angles because sum of 130° and 50° is equal to 180°.

Given here:  A || B.

Now if transversal D intersects A and B we have

If a transversal intersects two parallel lines, then each pair of interior angles on the same side of the transversal is supplementary, i.e. they add up to 180°. When two lines intersect each other, then the opposite angles, formed due to intersection, are called vertical angles or vertically opposite angles.

Thus we have 4x+5+3x+7=180

                               7x=168

                                 x=24

Hence, The value of x is 24

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The required triangles are similar because Corresponding sides of the triangles are proportional and their corresponding angles are same.

For plants, an isotype is a replica of the logotype; holotype and isotypes are frequently taken from the same individual plant or samples from the same collection. Hence Isotypes are pairs of related holotypes. Therefore, choice D is the right response.

To prove the similarity of two triangles,Corresponding sides of the triangles are proportional and their corresponding angles are same.

The scale factor of their side = 33/11 = 3

So, ΔQRS ~  ΔTUV with scale factor of 3.

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Since the respective sides of the required triangles are proportional and their corresponding angles are identical, the required triangles are similar.

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Answer:

Step-by-step explanation:

All except "E", "C", and "B".

A and D are true.

The line is negative and the slope is -5, not 5.

Answer: Marsha earned $375 in interest. ✅

Step-by-step explanation:

Multiply the amount Marsha deposited, which was $7,500, by the interest rate, which was 5%. 5% of $7,500 is $375, so that's the amount of interest Marsha earned.