Answer:
Explanation:
The general formula for a permutation is
nPr=n!/n-r!
n=20and r=2, so our equation becomes
20P2=20!/18!=(20×19)=380
Step-by-step explanation:
Find the absolute value. |4 - 5i|
The absolute value for |4 - 5i| =[tex]\sqrt{41}[/tex].
Without taking into account direction, absolute value describes how far a number is from zero on the number line. A number's absolute value can never be negative. Look at some illustrations. 5 is the sum of its absolute values. There are 5 units between 5 and 0. A negative number has a positive absolute value, too. If x 0, then |x| = -x gives the absolute value of the supplied number.
For illustration, |-2| = 2. No matter what the numerical value's sign, the absolute value is always positive.
Here complex number form =|a+ib|
= |4-5i| Here a=4, b=(-5).
[tex]|a+ib| = \sqrt{a^{2}+b^{2} } \\\\\sqrt{4^{2}+5^{2} } \\\\\sqrt{16+25} \\\\\sqrt{41} \\[/tex]
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i need help, i don’t understand
Answer:
x = 2; y = 10
Step-by-step explanation:
y = 5x
2x + 3y = 34
You have a system of equations. Since the first equation is already solved for y, we can easily use the substitution method. Substitute 5x for y in the second equation.
2x + 3y = 34
2x + 3(5x) = 34
2x + 15x = 34
17x = 34
x = 2
Now substitute 2 for x in the first equation.
y = 5x
y = 5(2)
y = 10
Solution: x = 2; y = 10
The trinomial x² - 14x + 49 can be expressed as
(1) (x-7)²
(2) (x + 7)²
(3) (x-7)(x + 7)
(4)) (x-7)(x + 2)
Answer:
(1)
Step-by-step explanation:
This is because (x-7)²=(x-7)(x-7), which when expanded using the FOIL method, is equal to x²-7x-7x+49=x²-14x+49.
Use synthetic division to find the result when 2x^3-14x^2+15x-18 is divided by x-6.
The Answer:
2x^2−2x+3
The result of the expression (2x³ - 14x² + 15x - 18) ÷ (x - 6) on dividing will be (2x² - 2x + 3).
What is Algebra?Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.
The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.
The expression is given below.
⇒ (2x³ - 14x² + 15x - 18) ÷ (x - 6)
The factor of the expression (2x³ - 14x² + 15x - 18) is given as,
⇒ (2x³ - 14x² + 15x - 18)
⇒ 2x³ - 12x² - 2x² + 12x + 3x - 18
⇒ 2x²(x - 6) - 2x (x - 6) + 3(x - 6)
⇒ (x - 6)(2x² - 2x + 3)
Then the expression is written as,
⇒ (2x³ - 14x² + 15x - 18) ÷ (x - 6)
⇒ [(x - 6)(2x² - 2x + 3)] / (x - 6)
⇒ (2x² - 2x + 3)
The final solution of the expression (2x³ - 14x² + 15x - 18) ÷ (x - 6) on dividing will be (2x² - 2x + 3).
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If m<1=55, then find the value of m<3
The measure of angle 3 is given as follows:
m < 3 = 55º.
What are vertical angles?Vertical angles are angles that are opposite by the same vertex on crossing segments, hence they share a common vertex, thus being congruent, meaning that they end up having the same angle measure.
The vertical angles in this problem are listed as follows:
1 and 3.2 and 4.The measure of angle 1 is given as follows:
m < 1 = 55º.
Angle 1 and angle 3 are vertical angles, hence the measure of angle 3 is obtained as follows:
m < 3 = 55º.
As angle 3 is congruent to angle 1.
Angles 2 and 4 are also supplementary to angles 1 and 3, meaning that the sum of their measures is of 180º, hence m<2 = m<4 = 125º.
Missing InformationThe diagram is given by the image shown at the end of the answer.
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#35
On the real number line, what is the midpoint of
-3 and 11?
A. -5
B. 0
C. 4
D. 7
E. 14
Answer:
C. 4
Step-by-step explanation:
You want the midpoint between -3 and 11 on the number line.
MidpointThe midpoint is the average of the end point coordinates:
(-3 +11)/2 = 8/2 = 4
The midpoint is 4.
LOT OF POINTS!!
PLEASE NEED ANSWERS QUICKLY!!
By using the properties of angle,
The proof of ∠1 ≅ ∠3 has been given below
What is angle?
When two straight lines intersect, an angle is formed. The point of intersection is called the vertex of the angle and the lines are called the arms of the angle
1. ∠2 ≅ ∠4 [Given]
2. m∠2= m∠4 [Angle Congruence Postulate]
3. ∠2 and ∠3 are supplementary [Given]
4. m∠2+m∠3 = 180° [Definition of Supplementary angles]
5. ∠1 and ∠4 are supplementary [Angle on a straight line]
6. m∠1+m∠4 = 180° [Definition of supplementary angles]
7. m∠1+m∠4 = m∠2+ m∠3 [ Substitution from 4 and 6]
8. m∠1+m∠4 = m∠4+m∠3 [Substitution from 2]
9. m∠1=m∠3 [Cancellation property]
10. ∠1 ≅ ∠3 [Converse of angle congruence theorem]
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Write the sum using summation notation. There may be multiple representations. Use i as the index of
summation.
1/3 - 1/9 + 1/27 - 1/81 + 1/243 - 1/729
The summation notation of the sum is given as follows:
[tex]\sum_{i = 1}^{6} \frac{(-1)^{i-1}}{3^i}[/tex]
How to write the summation notation?The summation notation of the sum is written considering the patterns of the terms that compose the terms.
First we look at the fact that the sum has six terms, and the first term is considered as having index 1, hence:
[tex]\sum_{i = 1}^{6}[/tex]
Then we consider that the signal is alternating, with the terms with odd indices being positive and those with even indices being negative, hence the numerator is of:
[tex](-1)^{i - 1}[/tex]
(any of -1 or +1 would work here).
Then we considering that the denominator is composed by the powers of 3, hence it is given by:
[tex]3^i[/tex]
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A company that manufactures golf balls produces a new type of ball that is supposed to travel significantly farther than the company’s previous golf ball. To determine this, 40 new-style golf balls and 40 original-style golf balls are randomly selected from the company’s production line on a specific day. A golf pro takes the balls to the driving range and hits the 40 new-style golf balls first and then the 40 original-style golf balls. The distance each ball travels is recorded. At the end of the session, the mean distance traveled for the new type of golf ball was found to be significantly greater than the mean distance for the original-style golf ball.
Which of the following is a valid conclusion?
Inferences can be made about all the golf balls produced on that day, and the conclusion can be made that new-style golf balls travel farther than the original-style of golf ball for this golf pro.
Inferences can be made about all the golf balls produced on that day; however, a conclusion cannot be made that new-style golf balls travel farther than the original type of golf ball for this golf pro.
Inferences cannot be made about all the golf balls produced on that day, and a conclusion cannot be made that new-style golf balls travel farther than the original type of golf ball for this golf pro.
Inferences cannot be made about all the golf balls produced on that day; however, the conclusion can be made that new-style golf balls travel farther than the original type of golf ball for this golf pro.
answer is B got it right
A valid conclusion is that;
Inferences can be made about all the golf balls produced on that day, and the conclusion can be made that new-style golf balls travel farther than the original-style of golf ball for this golf pro.
How to find the inference from the sample?An inference is defined as a conclusion that is reached based on certain pieces of evidence
In this sample research, we can see that randomization and replication conditions are met. This s because the balls are randomly selected and as such, the distance of the new ball can be compared to the distances of the original ball.
Therefore, a valid conclusion is written as;
Inferences can be made about all the golf balls produced on that day, and the conclusion can be made that new-style golf balls travel farther than the original-style of golf ball for this golf pro.
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Jerry bulit a table with a square top. the perimeter of the tabletop is 18 feet. He knows that the side lentgh of the table is 3, 3 1/4 4 or 4 1/2 use the equation 18 = 4s where s is the side length of the table to determine the side length explain how you found your answer
Answer:
4 1/2 ft
Step-by-step explanation:
18 = 4s
Divide both sides by 4.
18/4 = 4s/4
9/2 = s
4 1/2 = s
The side of the table is 4 1/2 ft.
Points A, B, and C are collinear. Point B is between A and C. Find the value of x.
AC = 24
AB = 2x + 1
BC = 3x − 2
Responses
A 55
B 33
C 99
D 7
Therefore, the value of the given equation of x comes out to be x =5.
What kinds of equations are there?Equations can be classified as either identities or conditioned equations. For each amount of the variables, an identity is true. Only specific values of the variables make a conditional equation legitimate. The equality sign ("="), which separate the two expressions, is a symbol for an equation.
Here,
Given data: A, B, and C are parallel, B is located between A and C, AC equals 24, AB equals 2x+1, and BC equals 3x-2.
In the event where A, B, and C are collinear and B is positioned between A and C, we obtain
Replace the given equation with AC = 24, AB = 2x+1, and BC = 3x-2.
AB plus BC equals AC
=> AC= AB + BC
On combining like terms we get
=> 2x+1 + 3x-2 = 24
=> 5x -1 =24
=>5x =25
=>x =5
Therefore, the value of x comes out to be x =5.
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an inequality shows the Relationship between numbers
The answer to this Question is YES. Inequalities do show the relation between Numbers.
What are Inequalities?
Inequalities are the operators the we want to compare the data when equality is not valid
Solution:
The Inequalities shows nice relation between numbers like when we say for example 2 and 4 we know that 2 is not equal to 4 but we know that
2 is less than 4 in this case inequalities help us to develop relations between numbers that are not equal
Inequalities are also used in inequations where they represents large set of data .
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How to turn 33.3 into a decimal and a fraction
Turn 33.3 into a fraction:
Write down 33.3 like this:
[tex]\dfrac{33.3}{1}[/tex]
Multiply the numerator and denominator by 10(since there is 1 digit after the decimal):
[tex]\dfrac{33.3\times10}{1\times10} \rightarrow\dfrac{333}{10}[/tex]
[tex]\dfrac{333}{10}[/tex] would be the fraction form of [tex]33.3[/tex].
To turn [tex]\dfrac{333}{10}[/tex] into a decimal, divide the numerator by the denominator:
[tex]333\div10=33.3[/tex]
Hope this helps!
Selena and Luis are building a model bridge out of balsa wood. To make a strong bridge, they create each post by laying out two long wooden poles horizontally, as shown in the diagram, and connecting them with smaller strips of balsa wood laid diagonally in a triangle pattern. The triangle pattern is continued down the entire length of the wooden poles.
The poles are 12 centimeters apart, and each small strip of balsa wood is 13 centimeters long.
If the two poles are each 100 centimeters long, how many small strips of balsa wood will they need to connect them?
If the two poles are each 100 centimeters long, The number of small strips of balsa wood they will need to connect them is: C. 20.
How to find the number of small strips?Using Pythagorean theorem formula to find triangle side a.
a=√b²+c²
a = √ 13² - 12²
a = √ 169 - 144
a = √ 25
a = 5
Hence, the number of small strips of balsa wood they need to connect them is:
100 / (2a)× 2
100 / ( 2×5) ×2
100/ 10 ×2
10 × 2
=20
Therefore the correct option is C.
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Use the first five terms of the trigonometric series to approximate the value of sin 4pi/5 to four decimal places. Then
compare the approximation to the actual value.
The first five terms of the given trigonometric series are (C) 0.5884, 0.5878.
What is a trigonometric series?
A mathematical series where the sines and cosines of integral multiples of a variable angle are used to connect the components.
Sine, Cosine, Tangent, Secant, Cosecant, and Cotangent are the six trigonometric functions.
Below is a graph of the first five terms in the trigonometric series of sin:
sinx = x - x³/3! + x⁵/5! - x⁷/7! + x⁹/9! .......
Insert x = 4π/5
sin4π/5 = 4π/5 - (4π/5)³/3! + (4π/5)⁵/5! - (4π/5)⁷/7! + (4π/5)⁹/9! .......
Upon resolution, we determine an approximate value of:
sin4π/5 = 0.5884
Find the true value now:
sin4π/5 = 0.5878
Therefore, the first five terms of the given trigonometric series are (C) 0.5884, 0.5878.
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Complete question:
Use the first five terms of the trigonometric series to approximate the value of sin to four decimal places. Then compare
the approximation to the actual value.
a. -0.9568, -0.9659
b. -0.9649, -0.9659
C. 0.5884, 0.5878
d. -0.9609, -0.9659
HELPP!!!
angles of a triangle
Math
help please! Thank u.
Answer:Try 81
Step-by-step explanation:
• Solve for x.
• Show all of your work to earn full credit.
•
Use the "mountain" icon to upload a piucture of your handwritten work.
→
-1 + 14x
12x + 17
If you do this for me you have to show me your work ;)
The value of 'x' for the given (alternate exterior angles) is found as 9.
Explain the term alternate exterior angles?The pair of angles the outside of the two parallel lines but on the opposing side of the transversal are known as alternate exterior angles.A transversal that crosses two parallel lines produces alternate exterior angles. They form two pairs (total four angles) of alternate outside angles since they are situated "outside" the pair of parallel lines but on different sides of the transversal.For the stated question.
-1 + 14x = 12x + 17 (alternate exterior angles)
Simplifying,
14x - 12x = 17 + 1
2x = 18
x = 9
Thus, the value of 'x' for the given (alternate exterior angles) is found as 9.
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consider a circle whose equation is x^2+y^2-2x-8=0. Which statements are true? select three options
The tree statements of the circle are
1) The radius of the circle is 3 units.
2) The center of the circle lies on x-axis.
3) The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.
What is center of a circle?
A circle's center is the point from which all of the distances to the other points on the circle are equal. The radius of the circle is the measurement at issue.
Given equation of circle is
x² + y² - 2x - 8 =0
x² - 2x + 1 - 1 + y² - 8 =0
(x - 1)² - 1 + y² - 8 =0
(x - 1)² + y² - 9 =0
(x - 1)² + y² = 3²
Compare the equation above equation with (x - h)² + (y - k)² = r²:
h = 1, k=0, r=0
The radius of the circle is 3 units. The center of the circle is (1,0) which lies on the x-axis.
Rewrite the equation of circle x² + y² = 9:
x² + y² = 3²
The radius of the circle is 3 units:
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Can you tell me the
Measure of
Answer:
please tell us what you need help with
Step-by-step explanation:
you did not include a number
Answer: what
Step-by-step explanation:
Determine if you have enough information to find the missing lengths. If so, find them. If not, explain why.
DE is parallel to AC . Find the lengths of AC and AD.
The lengths of AC and AD using the concept of similar triangles are; AC = 12.5 and AD = 3
How to solve similar triangles?We are given that;
∆BDE is a similar triangle to ∆BAC.
This means that their sides are proportional. Thus, we can say that;
BD/BA = BE/BC
Thus;
2/BA = 4/(6 + 4)
BA = 2 × 10/4
BA = 5
Similarly;
BE/BC = DE/AC
4/10 = 5/AC
AC = 5 × 10/4
AC = 25/2
Finally,
AC = 25/2 = 12.5.
Thus;
AD = BA - BD = 5 - 2 = 3.
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ssdfmsfamong treatments1743 435.751.27error total5503.4615step 6 of 8: what is the variation of the individual measurements about their respective means? please round your answer to two decimal places.
The variation of the individual measurements about their respective means is 2295.04.
Given that,
The table of the treatments and total amount is
SS DF MS F
Among Treatments 4974.88 621.86 2.98
Error ?
Total 7269.92 19
We have to find how do the various measurements differ from their respective means.
We know that,
We know the formula
SSE= SSTotal -SST
= 7269.92-4974.88
=2295.04
The variation of the individual measurements about their respective means is SSE that is 2295.04
Therefore, The variation of the individual measurements about their respective means is 2295.04.
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help me find the slope please
answer needs to be correct or i will report and ban you.
thank you
-lazyuser30
Five More Than One Third Of A Number Is Negative 2 What Is The Number?
Answer:
n = -21
Step-by-step explanation:
Five More Than One Third Of A Number Is Negative 2 What Is The Number?
1/3n + 5 = -2
subtract 5 from both sides:
1/3n + 5 - 5 = -2 - 5
1/3n = -7
multiply both sides by 3:
3(1/3n) = 3(-7)
n = -21
There are 3 fewer yellow beads than red beads. There are twice as many green beads as yellow beads. Write expressions for the number of red, green, and yellow beads.
Answer:
yellow = red - 3 and green = yellow x 2 and red = yellow + 3
or
green= (red-3) x 2
Step-by-step explanation:
Three fewer yellow than read is the same as saying red -3
twice as many green as yellow is the same as yellow x 2
if green is yellow x 2 you can substitute yellow for the equation to find yellow
you can flip the equation for yellow around by doing inverse operations. To have the equation equal red you need to move the three by doing its inverse. The opposite of subtraction is addition so you'd add 3 to each side, getting rid of the -3 and isolating the red to make the equation red=yellow+3
Shawn is typing a paper for class. He can type 1 2/7 pages in 1/3 of an hour. How many pages can Shawn type in one hour? A. B. C. D.
Answer:
5 1/7 pages in one hour. And what does "A.B.C.D." Mean?
Step-by-step explanation:
Question included in file
please help I need an answer quick
The midpoint of the line AN is (3(1/2) , -1).
What is midpoint?
The midpoint is located halfway between the two end points. Its x and y values are in the middle of the two x and y values.Add both "x" coordinates, divide by 2, and add both "y" coordinates, divide by 2 to calculate it.Midpoint of the line(x , y) = (x₁ + x₂ / 2) , (y₁ + y₂ / 2)
x₁ = 2, x₂ = 5
y₁ = -3, y₂ = 1
So,
Midpoint of the line(x , y) = (2+5/2) , ((-3)+1 / 2)
= (7/2 , -2/2)
= (7/2, -1)
We can write 7/2 as 3(1/2)
Hence, the midpoint of the line AN is (3(1/2) , -1)
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In 2014, 100 trees were planted by the people in Cherry Hill. The table below shows the number of trees planted of each type.
Trees Planted
Tree Number of Trees
Oak 45
Maple 17
Palm 28
Pine 10
Which circle graph correctly shows the information from the table?
Answer:
where is your circle graph
Step-by-step explanation:
i need the graph in order to solve this
In his free time, Gary spends 9 hours per week on the Internet and 12 hours per week playing video games. If Gary has five hours of free time per day, what percent of his free time is spent on the Internet and playing video games
Answer: 11.64%
Step-by-step explanation:
Duncan begins to hike a trail that is at an elevation of 1000 feet. As he hikes, his elevation increases 2000 feet each hour that he hikes. Determine the y-intercept.
The y-intercept in Duncan's hike situation as described in the task content is; 1000 feet.
What is the y-intercept in Duncan's hike scenario as described?It follows from the task content that the y-intercept of Duncan's hike scenario is to be determined.
In context, the y-intercept is otherwise termed; the starting value.
According to the task content; Duncan begins to hike a trail that is at an elevation of 1000 feet.
On this note, Duncan's starting elevation is; 1000 feet and consequently, the y-intercept in this scenario is; 1000 feet.
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Someone please answer this my question is in the picture I will give you brainliest and your getting 50 points no fraud answers.
Step-by-step explanation:
I will help you sir.
Given
Opposite Sides are Congruent
Reflexive
SSS
CPCTC
