Answer:
n=12
Step-by-step explanation:
lol we meet again
just use the permutation formula for this one.
n!/(n-3)!=1320
[n×(n-1)×(n-2)×(n-3)!]/(n-3)!=1320
n(n-1)(n-2)=1320
(n²-n)(n-2)=1320
n³-3n²+2n-1320=0
n=12
Please help!! IM GIVING 100
POINTS
Answer:
the answer is 9.5
Step-by-step explanation:
in a class of 20 students, how many conversations must be had so that every student talks to every other student in the class?
A) 190
B) 380
C) 760
D) 6840
Answer:
[tex]\text{A) }190[/tex]
Step-by-step explanation:
Similar to the handshake problem, if every student must talk with another person, each student will talk to 19 other students. However, a conversation consists of two people, so we must divide the number of ways we can rearrange the two people ([tex]2![/tex]). Therefore, our answer is [tex]\frac{20\cdot 19}{2!}=\boxed{\text{A) }190}[/tex]
someone help me plzz
Select all of the statements that are valid based on the survey results.
Answer:
all except the last one
Step-by-step explanation:
will name brainliest
Answer:
DE ≈ 6.97
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos55° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{EF}{DE}[/tex] = [tex]\frac{4}{DE}[/tex] ( multiply both sides by DE )
DE × cos55° = 4 ( divide both sides by cos55° )
DE = [tex]\frac{4}{cos55}[/tex] ≈ 6.97 ( to the nearest hundredth )
If anyone can solve this quickly I will give brainly
Answer:
m∠BFE = 171º
BE = 219º
Step-by-step explanation:
∠BFE is supplementary to ∠EFC
m∠BFE = 180 - 9
m∠BFE = 171º
--------------------------
The angle between two chords is equal to half the sum of the intercepted arcs:
∠BFE = (DC + BE)2
171 = (123 + BE)/2
342 = 123 + BE
219º = BE
Marking brainliest
Please help
Answer:
sociable I think........
The ratio of small dogs to big dogs at the park is 1:3. Which does not represent this ratio?
A.3:9
B.9:27
C.2:4
D.30:90
FAST PLS 26 POINTS!
Answer:
C.2:4
Step-by-step explanation:
1*2=2
3*2=6
2:6=2:4
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not true so it is C.
Hhrlppp me helppp meeree
what is the answer for
5x - 2 = 3x + 4
Answer: X = 3
Step-by-step explanation:
5x - 2 = 3x + 4
5x = 3x + 6 (+2 to both sides)
2x = 6
x = 3
In ΔNOP, the measure of ∠P=90°, NO = 49 feet, and OP = 19 feet. Find the measure of ∠N to the nearest degree.
Answer:
N=22.815≈23
Step-by-step explanation:
SIN N=19/49
N=\sin^{-1}(\frac{19}{49})
N=sin
N=22.815≈23
Linsay was going to visit her grandmother shop at the mall and then return home the route she took was in the shape of a triangle the distance between each patient visit it was 10 miles what type of triangle is formed by the route she traveled?
Answer:
an equilateral triangle
Step-by-step explanation:
A triangle is a three-sided polygon with three edges and three vertices. the sum of angles in a triangle is 180 degrees
Area of a triangle = 1/2 x base x height
the perimeter of a triangle = sum of the side lengths
An equilateral triangle is a triangle with three equal sides. the distance travelled her all equal to 10 miles.
Which relationship is true for the triangle based on the Law of Sines?
Answer:
We know the angle given refers to the length of the opposite side.
Given angle = 82 and the opposite side = 34 so part of the relationship is
sin 82 / 34 = sin ( ) / ( )
We are also given one side = 27 and that side is opposite angle at C
so that part of the relationship is sin C / 27
sin 82 / 34 = sin C / 27
A true relationship based on the Law of Sines was found in the given triangle.
In the given triangle
∠A=82°
Length of side in front of ∠A = 34
Length of side in front of ∠C = 27
What is sine law?According to sine law, in a triangle, ABC, if the sides in front of ∠A, ∠B, ∠C are a, b, c respectively then
[tex]\frac{SinA}{a} =\frac{SinB}{b} =\frac{SinC}{c}[/tex]
According to the sine law, the sides in front of angle A and angle C are 34 and 27 respectively.
So, [tex]\frac{Sin82}{34} =\frac{SinC}{27}[/tex]
Hence, a true relationship based on the Law of Sines was found in the given triangle.
To get more about sine law visit:
https://brainly.com/question/24175301
Résoudre l'équation suivantes :
-9x+3=3x+9
Answer:
x = - [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
- 9x + 3 = 3x + 9 ( subtract 3x from both sides )
- 12x + 3 = 9 ( subtract 3 from both sides )
- 12x = 6 ( divide both sides by - 12 )
x = [tex]\frac{6}{-12}[/tex] = - [tex]\frac{1}{2}[/tex]
Please help me !!!!!!
Second one is correct, The value of -a - c is positive
See, from the number line a = -6 and c = 2
Now, -a - c
= -(-6) -(2)
= +6 - 2 = 4
Which is true...
(Worth 30 points) I seriously need help3 please show your working:)
Answer:
a.
radius [r]=breadth[b]=4in
length [l]=7in
now
[C]area 1/4 th circle +area of 1/4th circle= semi circle =1/2×πr²h=1/2×π×4²=8πin²=25.13in²
area of rectangle [A]=l×b=7×4=28in²
total area =A+C=28in²+25.13in²=53.13in²
Step-by-step explanation:
b.
height [h] of triangle =12-4=8cm
base[b] of triangle= 12-3.5-3.5=5cm
area of triangle [A]=1/2×b×h=½×8×5=20cm²
again
length of square [L]=12cm
area of square [S]=L²=12²=144cm²
Area of shaded region=S-A=144-20=124cm²
PLEASE HELP ME HAVGDJSGEVSJSGE
Answer:
[tex]9\pi -18[/tex]
Step-by-step explanation:
SOMEONE PLEASE HELP!!!! I REALLY NEED HELP! ALSO PLEASE EXPLAIN IT NOT JUST THE ANSWER!! THANK YOU
Question: If 2cm represents 75 miles on a scale drawing. How long would a line segment be that represents 50 miles?
Answer:
1.33cm
Step-by-step explanation:
if 2cm is representing 75 miles, that means that .66 (repeating) is representative of 25 miles. This is because .66 (repeating) times 3 is equal to 2, and 25 times 3 is equal to 75. The reason 1.33cm would be equal to 50 miles is because if 25 miles is equal to .66, and 50/25 = 2, then you would have 2x.66 (repeating), to get 1.33.
PLEASEEEE HELP PLEASEEEE
Answer:
A. Parallelogram LMNP
B. 33
C. 98°
Step-by-step explanation:
LMNP is a parallelogram.
Adjacent angles of a parallelogram are Supplementary.
[tex] \therefore 82\degree +(3x - 1)\degree =180\degree [/tex]
[tex] \therefore (3x - 1+82)\degree =180\degree [/tex]
[tex] \therefore (3x +81)\degree =180\degree [/tex]
[tex] \therefore 3x +81 =180 [/tex]
[tex] \therefore 3x =180-81 [/tex]
[tex] \therefore 3x =99 [/tex]
[tex] \therefore x =\frac{99}{3} [/tex]
[tex] \therefore x =33 [/tex]
[tex] \implies m\angle N= (3x - 1)\degree=(3*33 - 1)\degree=(99-1)\degree = 98\degree [/tex]
[tex] \because m\angle L =m\angle N[/tex]
(Opposite angles of a parallelogram)
[tex] \therefore m\angle L =98\degree [/tex]
Answer:
1 no the quadilateral is parallelogram
2 no .82+82+3x-1+3x-1=360
162+6x=360
6x=198
x=198/6
x=33
3 no angle L =3x-1(opposite angles of a parallelogram are equal)
3*33-1
99-1
98
Step-by-step explanation:
PLEASEEEE EHELP ILL MARK BRANILIZES
Answer:
Below
Step-by-step explanation:
First, find the difference. You would do
-19 - (-9) = -10
-9 - 1 = -10 and so on...
The difference is -10
Now you need to find what number will make 11 when added to -10.
11 - (-10) = 21
The equation:
y = -10x + 21
Find the volume of the prism. Write the answer as a fraction in simplest form. A rectangular prism with length one-half millimeter, width one-fourth millimeter, and height three-fifths millimeter. V = mm3
Answer:
[tex]V=0.09375\ mm^3[/tex]
Step-by-step explanation:
Given that,
The length of the rectangular prism = (1/2) mm
Width = (1/4) mm
Height = (3/4) mm
We need to find the volume of the prism. We know that the formula for the volume of a rectangular prism is given by :
V = lbh
Put all the values,
[tex]V=\dfrac{1}{2}\times \dfrac{1}{4}\times \dfrac{3}{4}\\\\V=0.09375\ mm^3[/tex]
So, the volume of the prism is equal to [tex]0.09375\ mm^3[/tex].
Use the proportion below to determine 30% of 20.
Answer:
x=6
Step-by-step explanation:
What is the value of the expression?
2 + 4x32 - 7+1
-
this is timed..
Answer:
124
Step-by-step explanation:
Answer:
124
Step-by-step explanation:
2+(4)(32)−7+1
=2+128−7+1
=130−7+1
=123+1
=124
Can someone help me with this? Please and thank you
Answer:
what is the question ?
........................
Determine if the statement "Opposite sides of a parallelogram are congruent." is always, sometimes, or never true. Always, sometimes, or never
Explanation:
This can be proven by dividing the parallelogram into two triangles, and then proving the triangles congruent (use ASA). Once you know the triangles are congruent, then the corresponding pieces must be congruent as well. The corresponding pieces being the same length tells us that the opposite sides of a parallelogram are always congruent.
Sum of interior angles in a polygon is 3240. How many sides are in the polygon?
Answer:
20
Step-by-step explanation:
Giving brainlist to whoever answers
Answer:
C
Step-by-step explanation:
I hope it helps !!! :)
Answer:
i believe its b but i may be wrong i don know. hope this helped
Step-by-step explanation:
Which set of data could have been used to create the stem-and-leaf plot shown below?
#1. 6.3, 7.9, 9.5, 8.3, 8.1, 9.0, 6.7, 8.6, 9.1, 8.4, 8.1, 6.9, 8.3, 9.2:
#2. 64, 79, 95, 83, 81, 90, 67, 86, 91, 84, 81, 69, 83, 92
#3. 6.4, 7.9, 9.5, 8.3, 8.1, 9.0, 6.7, 8.6, 9.1, 8.4, 8.1, 6.9, 8.3, 9.2
#4. 63, 79, 95, 83, 81, 90, 67, 86, 91, 84, 81, 69, 83, 92
Answer:
#2 64, 79, 95, 83, 81, 90, 67, 86, 91, 84, 81, 69, 83, 92
Step-by-step explanation:
A stem-and-leaf plot is a detailed graphical presentation of quantitative data on special kind of table that promotes visualizing the individual numbers in the data with the number at the stem being the first digits of the numbers in the data set while the leaf represent the last digit of each number in the data set
Following the above rule, the data in the given stem-and-leaf plot are;
64, 67, 69, 79, 81, 81, 83, 83, 84, 86, 90, 91, 92, 95
Therefore, the set of data that could have been used to create the stem-and-leaf plot is the data set that has all the numbers in the given stem-and-leaf plot which is the data set;
64, 79, 95, 83, 81, 90, 67, 86, 91, 84, 81, 69, 83, 92.
Why is this equation not valid? Please help
Answer:
not valid..
Step-by-step explanation:
If a rectangle measures 12 meters by 16 meters, what is the length, in meters, of the diagonal of the rectangle?
Answer: it’s 20m long
Step-by-step explanation:
I can’t explain .—.
Answer:
20 meters
multiply the length by itself then multiply the width by itself then add them together then the square root of the total is the diagonal length.
step-by-step explanation :
16 x 16 = 256
12 x 12 = 144
256 + 144 = 400 sq rt = 20
Answer. The diagonal length is 20 meters