A traditional test for extrasensory perception (ESP) involves a set of playing cards, each of which shows a different symbol (circle, square, cross, star, or wavy lines). If C represents a correct guess and I an incorrect guess, what is the probability of

C?

CI (in that order) for two guesses?

CCC for three guesses?

III for three guesses?

Answer:(2x+7)+(2x+7)

Step-by-step explanation:

what you do is put 2x on the top and on the side and then seven on the top and on the side and then you got your answer

Answer:67/24

hope it helps bye

The expression equivalent to the given numerical expression is 67/24.

The given numerical expression is 2/3 ÷ 2⁴+(3/4 +1/6)÷1/3.

Here, 2/3 ÷ 2⁴+(3/4 +1/6)÷1/3

= 2/3 ÷ 16+(9/12 +2/12)÷1/3

= 2/3 × 1/16 +11/12 ×3/1

= 2/48 + 33/12

= 1/24 + 33/12

= 1/24 + 66/24

= 67/24

Therefore, the expression equivalent to the given numerical expression is 67/24.

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Sorry for bad handwriting

if i was helpful Brainliests my answer ^_^

hello

the answer is:

1)

Sin 28° = x/19 ----> x = 8.91 or 9

2)

tan 41° = x/32 ----> x = 27.8 or 28

3)

Cos 21° = x/26 ----> x = 24.2 or 24

4)

Cos 55° = 8/x ----> x = 13.9 or 14

5)

Sin 33° = 15/x ----> 27.57 or 28

6)

Cos 43° = 36/x ----> x = 49.2 or 49

7)

tan 72° = 25/x ----> x = 8.12 or 8

8)

Cos 64° = x/11 ----> x = 4.81 or 5

Answer:

35

Step-by-step explanation:

perimeter = sum of the lengths of the sides

In a parallelogram, opposite sides are congruent.

Two sides have length 7.5 cm.

We need the length of the top and bottom sides.

area = base × height

62 cm² = base × 6.2 cm

base = (62 cm²)/(6.2 cm)

base = 10 cm

Two sides have length 10 cm.

perimeter = 7.5 cm + 7.5 cm + 10 cm + 10 cm

perimeter = 35 cm

hello

the answer to the question is:

y = a cot(bx – c) + d

a = 1, b = 1/2, c = 0

the midline is y = d, so y = 0

the vertical stretch is 1, so label the y-axis so the inflection point of the curve is 1 above the midline, and the other inflection point is 1 below the midline

the period is:

T = π/b ----> T = 2π

the phase shift is:

PS = c/b ----> PS = 0

and also, there's no amplitude for tangent and cotangent, there is only the vertical stretch that takes the place of an amplitude

Answer:

amplitude does not exist. period = 2π (360°)

Step-by-step explanation:

there is no amplitude for tan θ or cot θ, since there is no limit up or down (positive/negative infinity).

period for cot θ is π (180°)

period for cot 1/2 θ is 2π (360°)

Answer:

-3x² - x - 5

Step-by-step explanation:

(3x² - 7x - 4) - (6x² - 6x + 1) =
= -3x² - x - 5

Yes, the coefficient of a value can be negative in an exponential function.

A coefficient in mathematics is a multiplicative factor in some term of a polynomial, series, or expression; it is generally a number, although it can be any expression.

Recall that the general form of an exponential function is f(x) = a^(bx + c), where a is the base.

This can be negative or positive. But cannot be equal to zero. A negative exponential function can model the decay of a radioactive substance or, in accounting, depreciation of an asset.

Thus, it is correct to state that , the coefficient a value can be negative in an exponential function.

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Answer:

y = - 3x + 7

Step-by-step explanation:

the equation of a line in slope- intercept form is

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

calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (0, 7) and (x₂, y₂ ) = (2, 1) ← 2 points on the line

m = [tex]\frac{1-7}{2-0}[/tex] = [tex]\frac{-6}{2}[/tex] = - 3

the line crosses the y- axis at (0, 7 ) ⇒ c = 7

y = - 3x + 7 ← equation of line

The equation of the line in fully simplified slope-intercept form is y = -2.8x + 7

The linear graph represents the given parameter

For the graph, we have the points

(0, 7) and (25, 0)

A linear equation is represented as

y = mx + c

Where

c = y when x = 0

So, we have

y = mx + 7

Using the point (2.5, 0) on y = mx + 7, we have

m(2.5) + 7 = 0

2.5m + 7 = 0

Evaluate

m = -2.8

So, we have

y = -2.8x + 7

Hence, the equation of the line in fully simplified slope-intercept form is y = -2.8x + 7

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Answer:x = {-4, 4}

explanation:

The distribution of the sample means will have a smaller standard deviation

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

Observations = 9

The population is not given

However by the theorem of the central limit; we understand that

The distribution of the sample means will always have a smaller standard deviation

This is because the sample mean selected from the population might not totally represent the whole population, but would have smaller standard deviation

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The value of f(-7) is 172.

To find the value of f(-7) for the given function f(x) = 4x^2 + 6x + 9, we substitute -7 for x in the function and evaluate it.

f(-7) = 4(-7)^2 + 6(-7) + 9

Simplifying the equation:

f(-7) = 4(49) - 42 + 9

= 196 - 42 + 9

= 163 + 9

= 172

Therefore, f(-7) = 172.

By substituting -7 into the function, we obtained the value of 172. This means that when x is equal to -7, the corresponding value of the function f(x) is 172.

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We are unable to determine the volumes of the individual components and the composite figure due to missing data on the radii and precise component configurations.

We must determine the volumes of the three separate parts—a cylinder, a 1 mm tall cone—in order to get the volume of the composite figure.

The 3 mm tall cone's volume is:

The formula  [tex]V = (1/3)r^{2} h,[/tex]  where r is the radius of the base and h is the height, determines the volume of a cone.

We must determine the radius because the cone's height is 3 mm. We are unable to determine the volume of the 3 mm tall cone without additional information.

Dimensions of the cylinder:

The formula V = r2h, where r is the radius of the base and h is the height, determines the volume of a cylinder.

We are unable to determine the volume of the cylinder without precise measurements for its height and radius.

Volume of the 1 mm tall cone: Once more, in order to calculate the volume of the 1 mm tall cone, we need to know the radius of the base. Without this additional information, we are unable to do so.

The composite figure's volume:

We would need to know the sizes and configurations of the different parts (cones and cylinder) within the composite figure in order to determine its volume.

We are unable to determine the volume of the composite figure without this information.

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Answer:

c. domain: {-2, 0, 2}, range: {-1, 1, 3}

Step-by-step explanation:

From the given points (negative 2, negative 1), (0, 1), (2, 3), we can determine the domain and range.

The domain represents the set of all possible x-values of the points, and the range represents the set of all possible y-values of the points.

In this case, we can see that the x-values are -2, 0, and 2, and the corresponding y-values are -1, 1, and 3.

Therefore, the correct answer is:

c. domain: {-2, 0, 2}, range: {-1, 1, 3}

b'

Let the given points be A(3,-5) and B(5,-1).

AB= sqrt of (5−3) ² +(−1+5)²

= sqrt of 4+16

= sqrt of 20

=2 sqrt of 5 units

As a result of the seed growing in a field with a different population of plants, we can witness how gene flow works in action.

It will have introduced its alleles into that population once this plant reproduces there. Any movement of people from one group to another—also known as migration—and/or the genetic material they carry is referred to as gene flow. Pollen being carried to a new location by the wind or individuals relocating to new cities or nations are just a few examples of the many different types of events that contribute to gene flow.

Vertical and horizontal gene flow are two different types of gene transfer. Gene flow describes the transfer of genetic material between groups.

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The ascending order of the rational numbers are -1.75 < -1.3 < 0.41 < 1.8

Given are the list of the rational numbers, so,

1 4/5, -7/4, 41% and -1.3

So,

1) The fraction form :-

a) 1 4/5 = 9/5

b) -7/4

c) 41% = 41/100

d) -1.3 = 13/10

2) The decimal form :-

a) 1 4/5 = 9/5 = 1.8

b) -7/4 = -1.75

c) 41% = 41/100 = 0.41

d) -1.3 = 13/10 = -1.3

3) The ascending order of the rational numbers =

You can arrange them by seeing the value and sign,

-1.75 < -1.3 < 0.41 < 1.8

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Sorry for bad handwriting

if i was helpful Brainliests my answer ^_^

Answer:

3) 50 in²

4)  85 cm²

Step-by-step explanation:

The given figure is composed of 2 triangles, each with a base of 10 inches and a height of 5 inches.

The area of a triangle is half the product of its base and height.

Therefore, the area of the composite figure can be calculated as follows:

[tex]\begin{aligned}\textsf{Area of compositie figure}&=\sf Area_{Triangle\;1}+Area_{Triangle\;2}\\\\&=\dfrac{1}{2} \cdot 10 \cdot 5 + \dfrac{1}{2} \cdot 10 \cdot 5\\\\&=5\cdot 5+5\cdot 5\\\\&=25+25\\\\&=50\; \sf square\;inches\end{aligned}[/tex]

Therefore, the area of the composite figure is 50 square inches.

[tex]\hrulefill[/tex]

The given figure is composed of a rectangle with width of 6 cm and length of 10 cm, and a triangle with base of 10 cm and height of 5 cm.

The area of a rectangle is the product of its width and length.

The area of a triangle is half the product of its base and height.

Therefore, the area of the composite figure can be calculated as follows:

[tex]\begin{aligned}\textsf{Area of compositie figure}&=\sf Area_{Rectangle} + Area_{Triangle}\\\\&=6 \cdot 10+\dfrac{1}{2} \cdot 10 \cdot 5\\\\&=60+5 \cdot 5\\\\&=60+25\\\\&=85\; \sf square\;centimeters\end{aligned}[/tex]

Therefore, the area of the composite figure is 85 square centimeters.

The logo that fits the requirement is the circle logo i.e. logo 1

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

The figures that represent the logos

For the circle logo, we have

Area = 22/7 * 1/2 * 1/2

Convert units to feet using the scale

Area = 22/7 * 1/2 * 7 * 1/2 * 7

Evaluate

Area = 38.5 square feet

Also, we have

Width = 2 * 1/2 * 7 feet

Width = 7 feet

For the plus-shaped logo, we have

Area = 5 * 1/2 * 1/2

Convert units to feet using the scale

Area = 5 * 1/2 * 7 * 1/2 * 7

Evaluate

Area = 61.25 square feet

Also, we have

Width = 3 * 1/2 feet * 7

Width = 10.5 feet

Hence, the logo that fits the requirement is the circle logo i.e. logo 1

This is because its area is not up to the maximum area (40 square feet) and the width is greater than the minimum width (4 feet)

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The graph of the inverse function is given by the image presented at the end of the answer, and the correct option is given by option 3.

The parent function for this problem is the cube function translated up two units, hence it is defined as follows:

y = x³ + 2.

To obtain the inverse function, first we must exchange the variables x and y on the definition of the function, as follows:

x = y³ + 2.

Then we must isolate the variable y, as follows:

[tex]y^3 = x + 2[/tex]

[tex]y = \sqrt[3]{x + 2}[/tex]

Which has the correct dashed graph given by option 3 on the image given.

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y = −(x − 2)(x − 9); the wolf leaped a distance of 7 feet using zeros 2 and 9. Therefore, option B is the correct answer.

Given that, trajectory can be mapped by the equation f(x) = -x² + 11x - 18.

Here, -x² + 11x - 18=0

-x² + 9x+2x - 18=0

-x(x-9)+2(x-9)=0

(x-9)(-x+2)=0

x-9=0 and -x+2=0

x=9 and x=2

Therefore, option B is the correct answer.

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The experiment is binomial , probability that 3 out of 14 customers buy a magazine is 0.06 and the expected value is 1.036.

The experiment described is binomial because it satisfies the following conditions:

The probability that exactly 3 out of the first 14 customers buy a magazine. Using the binomial probability formula:

[tex]P(X = k) = (nCk) \times (p^k) \times {q}^{n - k} [/tex]

Where:

n = number of trials (14 in this case)

k = number of successful trials (3 in this case)

p = probability of success (7.4% or 0.074)

q = 1-p

Plugging in the values:

P(X = 3) = (14C3) × (0.074³) × 0.926¹¹

P(X= 3) = 0.0633

The expected number of customers from this sample that will buy a magazine can be calculated using the formula:

E(X) = n × p

Where:

- n is the number of trials

- p is the probability of success

Plugging in the values:

E(X) = 14 × 0.074 = 1.036

Therefore, the experiment is binomial and the expected value is 1.036.

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Area of triangle A   = 13.5 square units

Area of triangle B   = 10.5 square units

Total area of figure =  24 square units

In the given figure,

It consist of two triangles

Now for triangle A :

Height = 3

Base    = 9

Since we know that,

Area of triangle = (1/2) x base x height

                          = 0.5 x 9 x 3

                          = 13.5 square units

Now for triangle B :

Height = 3

Base    = 7

Since we know that,

Area of triangle = (1/2) x base x height

                          = 0.5 x 7 x 3

                          = 10.5 square units

Now the total are of figure is sum of are of both triangles,

Therefore,

total area of figure,

⇒ 13.5 + 10.5

⇒ 24 square units

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The missing figure of question is attached below:

a) The deepest that the diver went is of: 432 yards deep.

b) It took 12 minutes for the diver to return to the surface.

c) After one minute, the diver was 132 yards deep.

The quadratic function modeling the diver's height after x seconds is given as follows:

d(x) = 12x² - 144x.

The coefficients are given as follows:

a = 12, b = -144, c = 0.

The x-coordinate of the vertex is given as follows:

x = -b/2a

x = 144/24

x = 6.

Item a:

As a > 0, in item a, the minimum height is given as follows:

d(6) = 12(6)² - 144(6)

d(6) = -432 feet.

Item b:

The roots of the function, in item b, are obtained as follows:

12x² - 144x = 0

12x(x - 12) = 0

Hence:

12 - 0 = 12, hence it took 12 minutes for the diver to return to the surface.

Item c:

After one minute, the depth of the diver, in item c, is given as follows:

d(1) = 12(1)² - 144

d(1) = -132 yards.

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The given fractions representing the conditional probability is P(A | B) = P(AnB)/P(B)

We know that,

Conditional Probability is:

This is the probability that an event has happened given another event. If the two events are A and B, hence;

The conditional probability of A given B is expressed as:

P(A | B) = P(AnB)/P(B)

This given the fractions representing the conditional probability

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The correct option is: (x + 3)² = 17; x equals negative 3 plus or minus the square root of 17(x = -3 ± √17) by completing the square

The completing the square method require we move constant term to the right hand side of the equation, divide the middle term and add its square to both sides of the equation as follows:

For the equation;

x² + 6x - 8 = 0

add 8 to both sides

x² + 6x = 8

divide 6 by 2 and add the square of the result to both sides

x² + 6x + 3² = 8 + 3²

by factorization;

(x + 3)² = 8 + 9

(x + 3)² = 17

x + 3 = ± √17 {take square root of both sides}

x = -3 ± √17

Therefore, by completing the square we the equation to be (x + 3)² = 17 and the solution for the value of x = -3 ± √17

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Solution of the given system is,

x = 8

y = 11

The given system of equation

-12x + 5y = 9 ....(i)

    y = 2x - 5  ...(ii)

Now we have to solve it by using substitution method.

So put value of y from equation (ii) into equation (i)

Therefore,

⇒ -12x + 5y = 9

⇒ -12x + 5(2x - 5) = 9

⇒ -12x + 10x - 25  = 9

⇒                    -2x  = 16

⇒                        x  = 8

Now put the values of x into (ii) we get,

⇒ y = 2x8 - 5

⇒ y = 11

Hence,

solutions be ,

x = 8

y = 11

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The equation of circle with a center at (9, 5) that passes through (13, 7) is (x - 9)² + (y - 5)² = 20.

we have Center at (9, 5) and passes thorough (13, 7).

To find the equation of a circle with center (h, k) and a point (x, y) on the circle, we can use the standard form equation of a circle:

(x-h)² + (y-k)² = r²

So,  (x - 9)² + (y - 5)² = r

Since the circle passes through (13, 7), then

(13 - 9)² + (7 - 5)² = r²

²4 + (2)² = r²

16 + 4 = r²

20 = r²

So, the equation of circle is

(x - 9)² + (y - 5)² = 20

Therefore, the equation of circle with a center at (9, 5) that passes through (13, 7) is (x - 9)² + (y - 5)² = 20.

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The difference between 1/5 and 2/10 is that they are different representations of the same value.

The ratio is a comparison of two quantities while proportional reasoning involves finding an equivalent ratio.

"Fifth" can refer to the ordinal number of a position or the unit fraction 1/5.

The diagram can be used to illustrate fraction concepts.

1/5 is simple, but 2/10 can be reduced to 1/5 by dividing both numbers by 2. They are both 0.2 or 20%. 1/5 and 2/10 are different fractions with different purposes.

Use 1/5 for 5 parts and 1/5 (simplified from 2/10) for 10 parts. 1/5 and 2/10 = 0.2, ratio reasoning emphasizes ratios between quantities. A 2:3 boys-to-girls ratio compares the constant ratio between changing quantities.

Proportional reasoning maintains constant ratios between quantities, while ratio reasoning uses fractions or ratios to compare relationships. For instance, if distance doubles, so does speed.

Step 3/5: "Fifth" is the ordinal number for the object five places away in a sequence. See diagram. The fifth circle is 1/5 of a whole in unit fraction sequence. Imagine a rectangle divided into five equal parts, each shaded to show 1/5. Shaded part = 1/5 of whole.

To show 25/7 with area model, make 7x25 rectangle and split into 7 equal parts. 25/7 per part.

1.2 The set model:

To represent 25/7, divide 25 objects into 7 equal sets, resulting in 3 objects per set with 1 left over. This represents the fraction of 25/7.

Step 5/5

Let's assume the width of the rectangular piece of paper as x cm. Then the length of the paper would be:

Now we know that the perimeter of the rectangle is given by the formula:

So, for this rectangle:

54 = 2(5x + x)

Simplifying and solving for x, we get:

54 = 2(6x)

27 = 6x

x = 4.5 cm

Therefore, the width of the paper is 4.5 cm and the length is 5 times the width which is 22.5 cm

The difference between 1/5 and 2/10 is that they are different representations of the same value.

The ratio is a comparison of two quantities while proportional reasoning involves finding an equivalent ratio.

"Fifth" can refer to the ordinal number of a position or the unit fraction 1/5.

The diagram can be used to illustrate fraction concepts.

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If the significance level is set at 5%, the probability of the treatment group's mean being greater than the control group's mean by 8 points or more is given as 5%, which is less than the significance level of 5%.

The correct answer is "less than."

The probability of the treatment group's mean being greater than the control group's mean by 8 points depends on the sample sizes, standard deviations, and means of both groups.

These values are used to calculate the t-score or z-score and the corresponding probability or p-value.

The probability can than be compared to the significance level to determine if the result is statistically significant.

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