what is the answer, i am having trouble solving this and i need to see an example

Answer:

−2/3 (10x3 ( raised to the third power) −9 +69)

Step-by-step explanation:

If the shown angles are equal (corresponding angles), then lines u and v are parallel.

65 = 12x + 5

60 = 12x

5 = x

So when x = 5, lines u and v are parallel.

Step-by-step explanation:

The mean is 78

   87 is 9 points above the mean

      this is   9 / 6.5  = + 1.39  standard deviations above the mean

                     z -score =+ 1.39 which represents .9177 ( from table )

or    91.77% scored LESS than this

           the remaining 8.23% scored HIGHER than this

                     8.23% * 25 students = .0823 * 25 = ~ 2 students

The given statement is incomplete as the significance level is not mentioned. The chi-square value of 29.25 indicates that there is a statistically significant difference between the observed and expected frequencies of the categorical data.

The degrees of freedom in this case are three, which means that the data has been divided into four categories. The exact interpretation of the chi-square value depends on the significance level. If the significance level is 0.05, which is commonly used, then the calculated chi-square value is greater than the critical value of 7.815.

This means that the null hypothesis of no difference between the observed and expected frequencies can be rejected at the 0.05 level of significance. In other words, there is evidence to support the alternative hypothesis that there is a significant difference between the observed and expected frequencies.

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Step-by-step explanation:

SA = 2 ( 3x6 + 6x3 + 3x3) = 90   ft^2     now double everything

SA = 2 ( 6x12 + 12 x6 + 6x 6 ) = 360   ft^2     FOUR times larger SA

The sides of the right triangle are

hypotenuse = 8.6 km

the other leg = 3.1 km

the other angle = 21°25'

The sides of the right triangle are solved using the given details

The third angle say A is solved by

third angle = 180 - 90 - 68°35'

third angle = 21°25'

The sides, a

tan 21°25' = a / 8

a = 8 * tan 21°25'

a = 3.13

a = 3.1

The hypotenuse (say c) is solved by

c = √(a² + b²)

c = √(3.1² + 8²)

c = √(73.61)

c = 8.58

c = 8.6

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The equation in point-slope form that represents this relationship is y - 1 = 3(x - 7). So, the correct option is OA.

To write an equation in point-slope form, we need to use the formula: y - y1 = m(x - x1), where (x1, y1) is a point on the line, and m is the slope.
In this case, we are given that Hani sells postcards for $3 each (slope = 3), and he sold 7 postcards for a net profit of $1. So, we have a point (7, 1) on the line, where 7 represents the number of postcards sold (x1) and 1 represents the net profit (y1).
Using this information, we can plug the values into the point-slope form equation:
y - 1 = 3(x - 7)
Thus, the correct answer is OA: y - 1 = 3(x - 7).

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Answer:

The answer is 37 + 28 + 31 =96

Step-by-step explanation:

Hope this helps!

Answer: The word "symbolism" contains 9 letters. To find the number of distinguishable ways to rearrange these letters, we can use the formula for the number of permutations of n objects, which is n! (n factorial).

However, in this case, there are repeated letters, specifically "s" and "m". To account for this, we need to divide the total number of permutations by the factorials of the number of times each repeated letter appears.

The letter "s" appears twice, so we divide by 2!. Similarly, the letter "m" also appears twice, so we divide by 2!.

Therefore, the number of distinguishable ways to rearrange the letters in the word "symbolism" is:

9! / (2! × 2!) = 362,880 / 4 = 90,720

So there are 90,720 distinguishable ways to rearrange the letters in the word "symbolism".

The general solution of the given system of differential equations is:

y = -37 × (1/2)x² + 5x + C, where C is the constant of integration.

The general solution of a system of derivative equations refers to a set of equations or formulas that represent all possible solutions of the given system. It includes an arbitrary constant or constants, which can take different values to yield different specific solutions.

The form of the general solution depends on the nature of the equations and the techniques used to solve them.

Here we have

dx/dt = 7x + y and dy/dt = -2x + 5y

To find the general solution of the given system of differential equations:

=> dx/dt = 7x + y  __ (1)

=> dy/dt = -2x + 5y  __(2)

Solve it using the method of simultaneous equations.

Solve Equation (1) for y:

y = dx/dt - 7x

Substitute the value of y in Equation (2):

dy/dt = -2x + 5(dx/dt - 7x)

Simplify the equation:

dy/dt = 5dx/dt - 2x - 35x

dy/dt = 5dx/dt - 37x

Rearrange the equation:

dy/dt - 5dx/dt = -37x

Multiply through by dt:

dy - 5dx = -37x dt

Integrate both sides of the equation:

∫(dy - 5dx) = ∫(-37x) dt

Integrate each term:

y - 5x = -37 * (1/2)x² + C

Simplify the equation:

y = -37 × (1/2)x² + 5x + C

Therefore,

The general solution of the given system of differential equations is:

y = -37 × (1/2)x² + 5x + C, where C is the constant of integration.

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The dimensions of the largest rectangle that can be formed if all the sides (including the partition) sum to 600 units are 150 units x 150 units. This solution yields an area of 22,500 square units.

To find the dimensions of the largest rectangle that can be formed if all the sides (including the partition) sum to 600 units, we can use the concept of optimization. Let's assume that the rectangle has a length of L and a width of W, with a partition dividing it into two smaller rectangles.
Since all the sides (including the partition) sum to 600 units, we can express this mathematically as:
L + W + 2x = 600
where x represents the length of the partition. Rearranging the equation, we get:
L + W = 600 - 2x
The area of a rectangle is given by the formula A = L x W. To find the largest possible area of the rectangle, we need to maximize this function.
Substituting the above equation into the area formula, we get:
A = (600 - 2x - W) x W
Expanding and simplifying, we get:
A = 600W - 2W^2 - Wx
To find the maximum value of A, we can differentiate it with respect to W and set it equal to zero:
dA/dW = 600 - 4W - x = 0
Solving for W, we get:
W = (600 - x)/4
Substituting this value of W back into the equation for A, we get:
A = (600 - x)^2/16
To maximize A, we need to minimize x. Since x represents the length of the partition, this means that the partition should be as small as possible. Therefore, the largest rectangle that can be formed will be a square with sides of 150 units, and the partition will have a length of zero.
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Answer:

f

Step-by-step explanation:

The solution is: the approximate surface area of the cone is 103.6 in², which is closest to option (B).

To find the exact surface area of the cone, we need to know the slant height of the cone. Since we are not given the slant height, we can use the Pythagorean theorem to find it:

Slant height² = h² + r²

Slant height² = 4² + 3²

Slant height² = 16 + 9

Slant height² = 25

Slant height = 5

Now that we know the slant height, we can use the formula for the surface area of a cone:

Surface area = πr² + πr×s

where s is the slant height

Surface area = π(3²) + π(3)(5)

Surface area = 9π + 15π

Surface area = 24π

Therefore, the exact surface area of the cone is 24π square units.

The surface area of a cone is given by:

Surface area = πr² + πr×s

where r is the radius of the circular base and s is the slant height.

We are given that the diameter of the circular base is 6 inches, so the radius is 3 inches. We are also given that the slant height is 8 inches. Using these values, we can calculate the surface area of the cone:

Surface area = π(3²) + π(3)(8)

Surface area = 9π + 24π

Surface area = 33π

We can approximate π as 3.14, so:

Surface area ≈ 33(3.14)

Surface area ≈ 103.62

Therefore, the approximate surface area of the cone is 103.6 in², which is closest to option (B).

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complete question:

PLEASE ANSWER THESE QUESTIONS THROUGHLY FOR BRAINLIEST!!

1.)

In this figure, h = 4, and r = 3.

What is the exact surface area of the cone?

(picture inserted below!!!!)

2.)

The diameter of a cone's circular base measures 6 inches, and the slant height of the cone is 8 inches.

What is the approximate surface area of the cone?

94.2 in²

103.6 in²

131.9 in²

257.5 in²

3.)

The slant height of a cone measures 15 centimeters. The height of the cone measures 12 centimeters.

What is the exact surface area of the cone?

4.)

The radius of the circular base of a cone measures 1.6 inches, and its slant height measures 2.5 inches.

What is the approximate lateral area of the cone?

Use π≈3.14.

round to the nearest tenth.

5.) The area of the circular base of a cone is 9π cm², and the slant height of the cone is four times the radius of the cone.

What is the approximate lateral area of the cone?

Use π≈3.14.

round to the nearest whole number.

The highlighted part of the circle is an inscribed angle.

Given that a circle is centered at O.

From the provided diagram,

A circle is centered at O.

YH is the diameter of the circle.

BK is the tangent of the provided circle at K.

And a secant of the circle BR.

As per the given choices,

Tangent: the line BK is tangent to a given circle.

center: the center of the circle is at O.

Central angle: ∠ROH.

Inscribed angle: ∠OYR.

An inscribed angle is the angle that an arc at any point on the circle subtends.

Therefore, an inscribed angle is ∠OYR.

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Bar graph best displays the data. Therefore, the correct option is option C among all the given options.

In mathematics, a graph is a visual representation or diagram that shows facts or values in an ordered way.  The relationships between two or more items are frequently represented by the points on a graph. Bar graph best displays the data.

Therefore, the correct option is option C.

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For the binomial hypothesis test, the null distribution is assumed to follow a binomial distribution with a specified value of p. In this case, since the ecologist hypothesizes that 40% of the plants are liverworts, the null distribution will be binomial(35, 0.40).

The value of p in the binomial distribution represents the probability of success (in this case, the probability of selecting a liverwort plant) under the null hypothesis. Therefore, in this hypothesis test, the value of p is 0.40, as specified in the ecologist's hypothesis.

By assuming a binomial distribution with p = 0.40, the ecologist can compare the observed proportion of liverworts in the sample to the expected proportion under the null hypothesis to evaluate whether there is evidence to support or reject the hypothesis.

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A linear programming problem with two decision variables can be solved by a graphical solution method. In this method, the constraints and the objective function of the linear programming problem are graphed on a two-dimensional coordinate plane, and the optimal solution is found at the intersection of the feasible region (the area defined by the constraints) and the level curve of the objective function.

The graphical solution method is a simple and intuitive way to solve linear programming problems with few decision variables, but it becomes impractical as the number of decision variables and constraints increase. In such cases, more complex algorithms, such as the simplex method or interior point methods, are used to find the optimal solution.

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If you know 2π is 360°, you can solve for 60°. 180 is half of 360, so π.

For converting 60 degrees to radians:

60×[tex]\frac{Pie}{180}[/tex] = π/3

60 degrees in radians is π/3

Hope it helps!

Answer:

y = 0.833x + 2.67

Step-by-step explanation:

Important Info:

Slope intercept form:

y = mx + b

where;

m = slope

b = y - intercept

x,y = distance of the line from x-axis/y-axis

Slope formula:

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

Solve:

Find two point on the graph:

(-2,1) (4,6)

Using slope formula to find slope:

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]m=\frac{6-1}{4-(-2)}[/tex]

[tex]m=\frac{6-1}{4+2}[/tex]

[tex]m=\frac{5}{6}[/tex]

[tex]m=0.833[/tex]

Now, put it in slope intercept form:

y = 0.833x + b

To find "b" we have to chose one order pair. Let's use (-2,1) and use it to substitute x and y.

y = mx + b

1 = 0.833x(-2) + b

1 = -1.67 + b

b = 2.67

Now, put it in slope intercept form:

y = 0.833x + 2.67

Hence, the equation for that graph is; y = 0.833x + 2.67

RevyBreeze

Answer:

18 + 30 + 57 + 30 + 15 = 150

P(1) = 18/150 = 3/25 = .12 = 12%

The probability that a teenager has exactly 1 pair of shoes in their closet is [tex]\( \dfrac{3}{25} \)[/tex].

Given the distribution:

Pairs of Shoes | Frequency

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

1             | 18

2             | 30

3             | 57

4             | 30

5             | 15

The frequency of teenagers with exactly 1 pair of shoes is 18.

The total number of teenagers is the sum of all the frequencies:

Total number of teenagers = 18 + 30 + 57 + 30 + 15

                                             = 150

Now, the probability:

[tex]\[ P(1) = \frac{\text{Number of teenagers with exactly 1 pair of shoes}}{\text{Total number of teenagers}} = \frac{18}{150} \][/tex]

[tex]\[ P(1) = \frac{3}{25} \][/tex]

So, the probability is [tex]\( \dfrac{3}{25} \)[/tex].

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When the depth reaches 8 inches, the rate at which the grain level is rising is approximately (15 / (2 * sqrt(3))) ft/min.

To find the rate at which the grain level is rising when the depth reaches 8 inches, we can consider the volume of the grain in the trough and its rate of change with respect to time.

The trough is in the shape of an equilateral triangle, so the cross-sectional area of the trough at any depth can be calculated using the formula: A = (sqrt(3)/4) * s^2, where s is the length of the side of the equilateral triangle.

In this case, the length of the side of the equilateral triangle is 2 feet, so the cross-sectional area of the trough is A = (sqrt(3)/4) * 2^2 = sqrt(3) square feet.

Given that the trough is 8 feet long, the volume V of the grain in the trough at any depth h can be calculated as V = A * h.

Now, let's differentiate both sides of the equation with respect to time t to find the rate at which the volume is changing: dV/dt = d(Ah)/dt.

Since the length of the trough remains constant, dh/dt represents the rate at which the depth is changing.

Therefore, dV/dt = A * (dh/dt).

We are given that the grain is poured into the trough at a rate of 5 cubic feet per minute, so dV/dt = 5 ft^3/min.

At the depth of 8 inches (or 8/12 = 2/3 feet), we want to find the rate at which the grain level is rising, which is dh/dt.

Plugging in the known values, we have: 5 = (sqrt(3) * h) * (dh/dt).

Simplifying the equation, we find: dh/dt = 5 / (sqrt(3) * h).

Substituting h = 2/3 (depth in feet), we can calculate the rate at which the grain level is rising.

dh/dt = 5 / (sqrt(3) * (2/3)) = 5 / (sqrt(3) * 2/3) = 5 / (2 * sqrt(3) / 3) = 5 * 3 / (2 * sqrt(3)) = (15 / (2 * sqrt(3))) ft/min.

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The width of a rectangular frame with a total area of 140 square inches, we set up an equation using the expressions for the length and width, simplify it, solve for x, and substitute the value of x into the expression for the width.

To solve for the width of a rectangular frame with a total area of 140 square inches, we first need to set up an equation using the given expressions for the length and width.
The formula for the area of a rectangle is length x width. Therefore, we can write:
(2x + 10)(2x + 6) = 140
We can then simplify this equation by expanding the expressions in the parentheses:
4x^2 + 32x + 60 = 140
Next, we can move all the terms to one side and simplify further:
4x^2 + 32x - 80 = 0
Now, we can solve for x by factoring or using the quadratic formula. After finding the value of x, we can substitute it into the expression for the width (2x + 6) to get the final answer.

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The product of 8759 x 2391 x 2391 x 7759 is 388,895,526,171,961.

To find the product of 8759 x 2391 x 2391 x 7759, we can use the associative property of multiplication. This property states that the way in which we group the factors does not affect the result of the multiplication.

So, we can group the factors in pairs and multiply each pair together before multiplying the products. Let's start with 8759 x 7759 and then multiply the products of 2391 x 2391.

8759 x 7759 = 67,907,881
2391 x 2391 = 5,716,881

Now, we can multiply these two products together to get the final result.

67,907,881 x 5,716,881 = 388,895,526,171,961

Therefore, the product of 8759 x 2391 x 2391 x 7759 is 388,895,526,171,961.

Using the associative property of multiplication can make it easier to find the product of a large number of factors. By grouping the factors in pairs and multiplying each pair together, we can simplify the problem and make it more manageable.

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Answer:

(x + 1)² + (y - 9)² = 4²

Step-by-step explanation:

equation of circle is (x - a)² + (y - b)² = r²

where a is x-coordinate of centre of circle, b is y-coordinate of centre of circle, r is the radius. radius = half of diameter.

(x - -1)² + (y - 9)² = 4²

(x + 1)² + (y - 9)² = 4²

Answer:

(x + 1)² + (y - 9 )² = 43

Step-by-step explanation:

got it right on my test!

To prove the identity sinh(2x) = 2 sinh(x) cosh(x), we can use the definitions of sinh(x) and cosh(x) and apply trigonometric identities for exponential functions.

We start with the left-hand side of the identity, sinh(2x). Using the definition of the hyperbolic sine function, sinh(x) = (e^x - e^(-x))/2, we can substitute 2x for x in this expression, giving us sinh(2x) = (e^(2x) - e^(-2x))/2.

Next, we focus on the right-hand side of the identity, 2 sinh(x) cosh(x). Again using the definitions of sinh(x) and cosh(x), we have 2 sinh(x) cosh(x) = 2((e^x - e^(-x))/2)((e^x + e^(-x))/2).

Expanding this expression, we get 2 sinh(x) cosh(x) = (e^x - e^(-x))(e^x + e^(-x))/2.

By simplifying the right-hand side, we have (e^x * e^x - e^x * e^(-x) - e^(-x) * e^x + e^(-x) * e^(-x))/2.

This simplifies further to (e^(2x) - 1 + e^(-2x))/2, which is equal to the expression we derived for the left-hand side.

Hence, we have proved the identity sinh(2x) = 2 sinh(x) cosh(x) by showing that the left-hand side is equal to the right-hand side through the manipulation of the exponential functions.

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Answer: 5 hours

Step-by-step explanation:

Since Chau works at a constant rate, we need to first find the unit price. We can do this by dividing 119/7 which equals 17. So Chau earns $17 per hour. Next we need to find how long he needs to work to earn $85. We can do that by dividing 85/17 which equals 5 hours.

So the answer is 5 hours.

By constructing these arcs and connecting the appropriate points, we ensure that the newly drawn line passing through point C is parallel to line AB. Remember to use a straightedge to draw the lines accurately and ensure that the arcs intersect correctly.

To construct a line that passes through point C and is parallel to line AB, the best next step is to use a compass to mark an arc centered at point C that intersects line AB at two distinct points.

Here are the steps:

1) Take a compass and set its width to a convenient distance.

2) Place the compass point on point C and draw an arc that intersects line AB at two different points, let's call them D and E.

3) With the compass width still set, place the compass point on point D and draw an arc that intersects the previously drawn arc.

4) Without changing the compass width, place the compass point on point E and draw another arc that intersects the previous arc.

5) Label the point where the two new arcs intersect as F.

6) Draw a straight line passing through point C and point F. This line will be parallel to line AB.

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Statement B may or may not be true, depending on whether AM = MT, and statement D may or may not be true, depending on the Orientation of LA.

In triangle MAH with MT as the perpendicular bisector of AH, let's consider the given statements.

A. AMAH is isosceles.

If MT is the perpendicular bisector of AH, then AM = MH. Therefore, triangle AMAH is isosceles, and statement A is always true.

B. AMAT is isosceles.

Since MT is the perpendicular bisector of AH, then AT = TH. However, there is not enough information to determine whether AM = MT. Therefore, statement B may or may not be true, depending on whether AM = MT.

C. MT bisects ZAMH.

Since MT is the perpendicular bisector of AH, then MT also bisects the base of triangle MAH, which is ZAMH. Therefore, statement C is always true.

D. LA and ZTMH are complementary.

Since MT is the perpendicular bisector of AH, then ZTMH is a right angle. However, there is not enough information to determine whether LA is perpendicular to MT. Therefore, statement D may or may not be true, depending on the orientation of LA.

statement B may or may not be true, depending on whether AM = MT, and statement D may or may not be true, depending on the orientation of LA. Therefore, the statement that is not always true is:

B. AMAT is isosceles.

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