Answer:
A combined mean is simply a weighted mean, where the weights are the size of each group. For more than two groups: Add the means of each group—each weighted by the number of individuals or data points, Divide the sum from Step 1 by the sum total of all individuals (or data points).
Answer: A combined mean is simply a weighted mean, where the weights are the size of each group. For more than two groups: Add the means of each group—each weighted by the number of individuals or data points, Divide the sum from Step 1 by the sum total of all individuals (or data points).
Step-by-step explanation:
Given there's 5 red balls and 2 blue balls. What's the probability that after two picks we have a red ball and a blue ball
Answer:
the answer is 58 dear because there he couldn't figure out what he meant
What is the value of x
A 19
B 22
C 67
D71
Answer:
Step-by-step explanation:
(2x+4)° + 42° = 180°
x = 67°
Triangle lurlurl, u, r has a uniform thickness of 2.52.52, point, 5, as shown at left. the length of \overline{ud} ud start overline, u, d, end overline, which is the height of the triangle, is 25\sqrt325√ 3 25, square root of, 3, end square root. the triangle has a right angle at vertex uuu and an angle of \dfrac\pi6 6 π start fraction, pi, divided by, 6, end fraction at vertex rrr. given that the width, www, of the shaded triangle is about 50\sqrt{3}50√ 3 50, square root of, 3, end square root, what is the height, hhh, of the shaded triangle to the nearest tenth?
Answer:
37.5
Step-by-step explanation:
The line which marks the height 25\sqrt325
3
25, square root of, 3, end square root of the large triangle is vertical, and the base of the triangle is horizontal, so their intersection is a right angle. The angles in the large triangle add up to \piπpi, so the remaining angle is:
\qquad \begin{aligned} \pi - \dfrac\pi2 - \dfrac\pi6 =& \dfrac\pi3 \end{aligned}
π−
2
π
−
6
π
=
3
π
The original triangle L U R is shown, but now the length of segment U D is shown to be '25 times the square root of 3', and angle U L R is shown to have a measure of ' pi divided by 3' radians.
The original triangle L U R is shown, but now the length of segment U D is shown to be '25 times the square root of 3', and angle U L R is shown to have a measure of ' pi divided by 3' radians.
Hint #2
Looking at the left triangle ULDULDU, L, D, the hypotenuse length LULUL, U is:
\qquad \begin{aligned} \dfrac{25\sqrt3}{\sin\!\left({\Large\frac\pi3}\right)} \end{aligned}
sin(
3
π
)
25
3
Looking at the big triangle LURLURL, U, R, we see that the base length LRLRL, R is:
\qquad \begin{aligned} &\left(LU\right)\dfrac{1}{\sin\!\left({\Large\frac\pi6}\right)} \\ \\ =&\left(\dfrac{25\sqrt3}{\sin\!\left({\Large\frac\pi3}\right)}\right)\dfrac{1}{\sin\!\left({\Large\frac\pi6}\right)} \\ \\ =&\left(\dfrac{25\sqrt3}{ \quad\large\frac{\sqrt{3}}{2}\quad }\right)\dfrac{1}{ \quad\large\frac{1}{2}\quad } \\ \\ =&\left(\dfrac{25}{ \quad\large\frac{1}{2}\quad }\right)\dfrac{1}{ \quad\large\frac{1}{2}\quad } \\ \\ =&100 \\ \end{aligned}
=
=
=
=
(LU)
sin(
6
π
)
1
⎝
⎜
⎛
sin(
3
π
)
25
3
⎠
⎟
⎞
sin(
6
π
)
1
⎝
⎜
⎛
2
3
25
3
⎠
⎟
⎞
2
1
1
(
2
1
25
)
2
1
1
100
Hint #3
The large triangle has uniform thickness, so the inner triangle's sides are parallel to the outer triangle's sides. Therefore, the inner triangle's angles are congruent to the outer triangle's angles. The two triangles are similar.
Hint #4
Similar triangles have proportional lengths, so we can set up the equation:
\qquad \begin{aligned} \dfrac{h}{w} =& \dfrac{H}{W} \\ \\ \dfrac{h}{50\sqrt{3}} \approx& \dfrac{25\sqrt3}{100} \end{aligned}
w
h
=
50
3
h
≈
W
H
100
25
3
Hint #5
\qquad\qquad\, \begin{aligned} \dfrac{h}{50\sqrt{3}} \approx& \dfrac{\sqrt3}{4} \\ \\ {h} \approx& \dfrac{{50\sqrt{3}}\sqrt3}{4} \\ \\ {h} \approx& \dfrac{25\cdot3}{2} \\ \\ h \approx& 37.5 \\ \\ \end{aligned}
50
3
h
≈
h≈
h≈
h≈
4
3
4
50
3
3
2
25⋅3
37.5
Hint #6
To the nearest tenth, the height of the inner triangle is:
\qquad\qquad\, \begin{aligned} h \approx& 37.5 \end{aligned}
h≈
37.5
*note: The answers 37.337.337, point, 3 and 37.437.437, point, 4 may have been obtained by other methods of solving for hhh since this is an approximation. Those answers are also accepted as correct.
Two triangles are similar if the sides of both triangles can be represented as equivalent ratios. The height of the shaded triangle is 37.5 units.
Given that:
[tex]\overline{UD} = 25\sqrt 3[/tex]
[tex]w = 50\sqrt3[/tex]
See attachment
First, we calculate side length [tex]\overline{LD}[/tex].
This calculated using tangent trigonometry ratio
[tex]\tan(\theta) = \frac{Opposite}{Adjacent}[/tex]
So, we have:
[tex]\tan(90-\frac{\pi}{3}) = \frac{\overline{UD}}{\overline{LD}}[/tex]
[tex]\tan(90-30) = \frac{\overline{UD}}{\overline{LD}}[/tex]
[tex]\tan(60) = \frac{\overline{UD}}{\overline{LD}}[/tex]
This gives:
[tex]\tan(60^o) = \frac{25\sqrt3}{\overline{LD}}[/tex]
Make LD the subject
[tex]\overline{LD}= \frac{25\sqrt3}{\tan(60^o)}[/tex]
[tex]\overline{LD}= \frac{25\sqrt3}{\sqrt 3}[/tex]
[tex]\overline{LD}= 25[/tex]
Next, we calculate side length [tex]\overline{DR}[/tex].
This calculated using tangent trigonometry ratio
[tex]\tan(\theta) = \frac{Opposite}{Adjacent}[/tex]
So, we have:
[tex]\tan(\frac{\pi}{6}) = \frac{\overline{UD}}{\overline{DR}}[/tex]
This gives:
[tex]\tan(30^o) = \frac{25\sqrt3}{\overline{DR}}[/tex]
Make DR the subject
[tex]\overline{DR}= \frac{25\sqrt3}{\tan(30^o)}[/tex]
[tex]\overline{DR}= \frac{25\sqrt3}{1/\sqrt 3}[/tex]
[tex]\overline{DR}= 25\sqrt3 \times \sqrt 3[/tex]
[tex]\overline{DR}= 25 \times 3[/tex]
[tex]\overline{DR}= 75[/tex]
Calculate side length [tex]\overline{LR}[/tex]
[tex]\overline{LR} = \overline{LD}+\overline{DR}[/tex]
[tex]\overline{LR} = 25+75[/tex]
[tex]\overline{LR} = 100[/tex]
Because the triangle has a uniform thickness, the small and the big triangle are similar triangles.
So, the height (h) is calculated using the following equivalent ratios
[tex]h:w =\overline{UD}:\overline{LR}[/tex]
Express as a fraction
[tex]\frac hw =\frac{\overline{UD}}{\overline{LR}}[/tex]
Make h the subject
[tex]h =\frac{\overline{UD}}{\overline{LR}} \times w[/tex]
Substitute known values
[tex]h =\frac{25\sqrt3}{100} \times 50\sqrt 3[/tex]
[tex]h =\frac{3750}{100}[/tex]
[tex]h =37.50[/tex]
Hence, the height of the shaded triangle is 37.5 units.
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Keisha is saving money to buy a game. So far she has saved $24, which is three-fourths of the total cost of the game. How much does the game cost?
HELPPPPP
Answer:
32 dollars is the cost of the total game
Step-by-step explanation:
24 divided by 3 is 8
8 times 4 is 32
10=2x - 4 what is the answer
Answer:
7
Step-by-step explanation:
10=2(7)-4
10=14-4
A small glass holds about 250 what ?
litros de agua porque nolose pero quiero los pùntos
find the slope of the line pictured
write two mixed so that all rules are applied: one number is larger than the other by 4 2/3, the difference of the numbers is equal to the smaller number, and the sum of the differences is a natural number
Answer:
write 2 mixed whats
Step-by-step explanation:
a sequence of numbers is 8, 15, 22, 29. explain why 96 will not be a term in this sequence?
Answer:
It want touch/Connect Either way the closest it can get was 99
8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99.
Find the area of the trapezoid?
Answer:
Very simple 6th graders
Step-by-step explanation:
7 X 5 = 35 DIVIDE3D BY 2 = 17.5 THAT IS THE TRIANGLE BUT I CAN NOT SEE THE OTHER.
but i will still help
the number on the top needs to be multiplyed by the number on the side and then add it to the 17.5 and that is your answer
Can someone please help me on this???
Answer:
8x-17+63+3x+2=180(sum of triangle )
Step-by-step explanation:
11x-48=180
11x=180+48
11x=228
X=228÷11
X=20.72
Answer:
x=12
Step-by-step explanation:
The angles of a triangle add up to 180
63+8x-17+3x+2=180
46+2+8x+3x=180
48+11x=180
11x=132
x=12
which step comes first -b-2<8
Answer:
Step-by-step explanation:
Alright so the step that comes first is adding two to both sides.
Let me show you,
Step 1
-b-2<8 Add 2 to both sides
-b<10
Then you divide the sides by -1
-b<10
b>-10
What is the lowest common denominator of the following two fractions?
3/4 and 1/5
Answer:
20
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
factor 9x-12xy plss help thx
In ΔSTU, t = 34 cm, u = 16 cm and ∠S=56°. Find the length of s, to the nearest centimeter.
Answer:
28
Step-by-step explanation:
a^2=b^2+c^2-2bc\cos A
a
2
=b
2
+c
2
−2bccosA
From reference sheet.
s^2 = 34^2+16^2-2(34)(16)\cos 56
s
2
=34
2
+16
2
−2(34)(16)cos56
Plug in values.
s^2 = 1156+256-2(34)(16)(0.559193)
s
2
=1156+256−2(34)(16)(0.559193)
Square and find cosine.
s^2 = 1156+256-608.40188
s
2
=1156+256−608.40188
Multiply.
s^2 = 803.59812
s
2
=803.59812
Add.
s=\sqrt{803.59812} \approx28.348 \approx28
s=
803.59812
≈28.348≈28
The graph of the rational function f is shown. Which graph is the graph of g(x)=-f(x)?
Using translation concepts, it is found that graph A is equivalent to the graph of g(x)=-f(x).
What is a translation?A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.
The transformation g(x)=-f(x) is a reflection over the x-axis of function f(x), which is given by graph A.
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What is the equation of a line that goes THROUGH (-2, 3) and is PERPENDICULAR to the line
y = -3x+2
Find the vertex of the parabola y = 2x2 + 10x + 8
Answer:
The vertex is -5/2 and -9/2
Step-by-step explanation:
I looked it up on math
way
A parabola is a mirror-symmetrical planar curve that is nearly U-shaped. The vertex of the parabola y = 2x² + 10x + 8 is (-2.5, -4.5).
What is a quadratic equation?A quadratic equation is an equation whose leading coefficient is of second degree also the equation has only one unknown while it has 3 unknown numbers. It is written in the form of ax²+bx+c.
Then its roots are given as:
[tex]x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/tex]
A parabola is a mirror-symmetrical planar curve that is nearly U-shaped.
y = a(x-h)² + k
where,
(h, k) are the coordinates of the vertex of the parabola in the form (x, y);
a defines how narrower the parabola is, and the "-" or "+" that the parabola will open up or down.
The general form of a parabola is written in the form ax²+bx+c, which is a quadratic equation. While the vertex form of the parabola is written as y=a(x-h)² + k.
Given that the equation of the parabola is y = 2x² + 10x + 8. Now if we compare the general equation of the parabola with ax²+bx+c, the value of a, b, and c will be 2, 10, and 8, respectively.
Further, the vertex of the parabola can be written as,
h =−b/2a
h = -10 / 2(2)
h = -10/4
h = -2.5
k = -(b² - 4ac) / 4a
k = -[10² - 4(2)(8)] / 4(2)
k = (100 - 64) / 8
k = -36/8
k = -4.5
Hence, the vertex of the parabola y = 2x² + 10x + 8 is (-2.5, -4.5).
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Find the volume of the cone. Use 3.14 for pi.
Answer:
V=37.68
Step-by-step explanation:
The formula for the volume of a cone is V=1/3πr^2h. First, plug the values in to the varibles to get V=1/3π3^2(4), since 3 is the radius and 4 is the height. Now simplify the equation.
V=1/3π3^2(4)
V=1/3π9(4)
V=1/3π36
Multiply 36 by pi, which the equation wants you to use as 3.14.
V=1/3(113.04)
Now simplify to get V=37.68.
I hope this helps! Have a great day/night!
A geometric figure is dilated by a scale factor of 1.5 with the origin as the center of dilation. Which of the following sentences best describes this dilation?
The x- and y-coordinates of every point of the figure is multiplied by 1.5.
Not here.
The y-coordinate of every point of the figure is multiplied by 1.5.
The x-coordinate of every point of the figure is multiplied by 1.5.
Answer:
Step-by-step explanation:
The x and y points are multiplied by 1.5
See the graph
Notice that if you start with (4,6) and dilate by a scale of 1.5 then the final point is (6,9)
The slope of these two points (if they were on a line should be 1.5
x2 = 6
x1 = 4
y2 = 9
y1 = 6
m = (9 - 6)/(6 - 4)
m = 3 / 2
m = 1.5 which is what it should be.
The x-coordinate of every point of the figure is multiplied by 1.5.
The scale factor is 1.5, and the center of dilation is the origin (0, 0).
When the figure is dilated by a scale factor of 1.5 with the origin as the center, it means that each point's x-coordinate and y-coordinate are separately multiplied by 1.5.
The y-coordinate of every point of the figure is multiplied by 1.5 is not correct the reason is that in this specific dilation scenario, only the x-coordinate is multiplied by 1.5, while the y-coordinate remains the same. The origin as the center of dilation means that the points move away from or towards the origin, maintaining the same vertical distance.
Therefore, the correct description is "The x-coordinate of every point of the figure is multiplied by 1.5."
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Work out the size of obtuse angle DOF, giving a reason for your answer.
Answer:
104
This is because angle at the center is twice the angle at the circumference
Step-by-step explanation:
104 is the size of obtuse angle DOF because the angle at the center is twice the angle at the circumference.
What is an obtuse angle?An obtuse angle is any angle greater than 90 °: Straight angle is a measurement angle equal to 180 °: Zero angles is a measurement angle equal to 0 °: Complementary angle is the angle at which the sum of the measurements is 90 °: Complementary angles are the following angles: The total dimensions are 180 °.
Now we know that angles below 180 degrees and above 90 degrees are obtuse. Examples of bluntness include 110 °, 135 °, 150 °, 179 °, 91 °. Therefore, all angles in the range of 90 ° to 180 ° are obtuse.
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can sombody please answer this.
Answer:
option (3)is correct, take 180 +180=360
Step-by-step explanation:
I DON'T KNOW IF THIS IS CORRECT IM SORRY IF IT'S WRONG!!!!!!
Expand and simplify 4(2x +7) – 3(x + 5)
Answer:
The answers is 5x + 13
It Equal to 5x + 13
Can yall check if I did this correct plus I will give you brainliest if you answer no joke promise❤
A decorative clock for a hotel lobby has a radius of 7 feet. What is the approximate area, in square feet, of the clock?
What about a clock with a diameter of 12 feet?
Answer:
153.94
Step-by-step explanation:
Name the angle pair relationship for the pair of angles in the picture.
Answer:
Supplementary
Step-by-step explanation:
These angles are on the same line, they add up to 180
Find the volume of a triangular prism that has a triangular base of 14 and height of 17 with a prism height of 5.
The diagram shows three angles at a point. 168 x 123. Work out the value of x
Answer:
SOMEONE ANSWER THIS PLSSSSSSSSS :D
Step-by-step explanation:
Which ones are true?
Answer:
The last three answers.
Step-by-step explanation:
What’s the area of this parallelogram
Answer:
360%
if not u question isnt correct
hope this might help you
Answer: Multiply the base by the height
for example A=B x H
Step-by-step explanation: