Answer:
When we divide 81 -x²y² by (9-xy) (3 + xy), we determine the expression is:
[tex]\frac{81-x^2y^2}{\left(9-xy\right)\left(3+xy\right)}=\frac{9+xy}{3+xy}[/tex]
Step-by-step explanation:
Let us divide 81 -x²y² by (9-xy) (3 + xy)
so
Given the expression
[tex]\frac{81-x^2y^2}{\left(9-xy\right)\left(3+xy\right)}[/tex]
Factor -x²y² + 81 = (9+xy) (9-xy)
[tex]\frac{81-x^2y^2}{\left(9-xy\right)\left(3+xy\right)}=\frac{\left(9+xy\right)\left(9-xy\right)}{\left(9-xy\right)\left(3+xy\right)}[/tex]
Cancel the common term: 9-xy
[tex]=\frac{9+xy}{3+xy}[/tex]
Therefore, when we divide 81 -x²y² by (9-xy) (3 + xy), we determine the expression is:
[tex]\frac{81-x^2y^2}{\left(9-xy\right)\left(3+xy\right)}=\frac{9+xy}{3+xy}[/tex]
Which expression is not equal to 28?
Answer: 1,107 divided by 41
Step-by-step explanation:
Which expression is NOT equal to 28? A. 1,288 ÷ 46 B. 1,820 ÷ 65 C. 1,456 ÷ 52 D. 1,107 ÷ 41
D is correct.
= 3x + 4, what is y when x is 1, 2, and 3
Answer:
when x is 1 y is 7
when x is 2 y is 10
when x is 3 y is 13
Step-by-step explanation:
The table shows data collected from 14 people. Shoe Size, x 8.5 9 9 9.5 10 10 10.5 10.5 11 11 11 12 12 12.5 Height (inches), y 66 68.5 67.5 70 70 72 71.5 70 71 71.5 73 73.5 74 74 Determine the correlation coefficient for the data. Round to the nearest hundredth.
Answer:
0.9266
Step-by-step explanation:
Given the data:
Shoe size x :
8.5
9
9
9.5
10
10
10.5
10.5
11
11
11
12
12
12.5
Height y :
66
68.5
67.5
70
70
72
71.5
70
71
71.5
73
73.5
74
74
The correlation Coefficient obtained from the online Coefficient of regression calculator is 0.9266 which depicts a strong positive relationship between shoe size and height
The correlation coefficient for the data is 0.93 and this can be determined by using the formula of the correlation coefficient.
Given :
The table shows data collected from 14 people.
A statistical measure of the strength of the relative movement between two variables is known as the correlation coefficient.
The formula of the correlation coefficient is given by:
[tex]\rm r = \dfrac{\sum (x_i-\bar{x})(y_i-\bar{y})}{\sqrt{\sum(x_i-\bar{x})^2\sum(y_i-\bar{y})^2} }[/tex]
where r is the correlation coefficient, [tex]\bar{x}[/tex] is the mean of the values of the x variable, [tex]x_i[/tex] values of the x-variable in the sample space, [tex]y_i[/tex] values of the y-variable in a sample space, and [tex]\bar{y}[/tex] is the mean of the values of the y-variable.
Now, from the attached table substitute the values of the known terms in the above formula.
[tex]\rm r = \dfrac{35.4464286}{\sqrt{(19.23214289)\times (76.08928571)} }[/tex]
Simplify the above expression.
[tex]\rm r = \dfrac{35.4464286}{38.25388889} }[/tex]
r = 0.93
So, the correlation coefficient for the data is 0.93.
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1 point
19. Write the equation for this line in slope-intercept form. (y=mx+b)*
Answer:
y=-4x+5...
Step-by-step explanation:
y=-4x+5...
6/7 × 1/2 = ? Question 29 options: 37 127 27 314
On holidays three friends decided to buy a Christmas tree for $96. They made a cash contribution of 3: 5: 8. The two friends who invested less decided to return the third friend's money so that their cash contributions became the same. What is the ratio of the money returned by the first person to the money returned by the second person?
Answer:
7 : 1Step-by-step explanation:
Total money = $96Contribution ratio = 3 : 5 : 8Contribution by each:
3x + 5x + 8x = 9616x = 96x = 63x → $18, 5x → $30, 8x → $48Equal contribution is:
$96/3= $32Returned by first and second person:
$32 - $18 = $14$32 - $30 = $2Ratio of returned amount:
14 : 2 = 7 : 1An official for a regional baseball league examines attendance data for teams in the league. For each team in the league, the number of losses and the average game attendance is shown in the scatterplot. The value of r for the scatterplot is –0.847.
Which of these data combinations weakens the correlation?
2 losses, 11.9 thousand fans
2 losses, 15.2 thousand fans
5 losses, 10.3 thousand fans
9 losses, 7.7 thousand fans
Answer:
It’s B brotha
Step-by-step explanation:
X=number of hours
Y=number of tents made
X=0,1,2,3,4,5,6,7,8
Y=6,7,8,9,10,11,12,13,14
What is the slope? What does it represent?
Answer:
[tex]Slope = 1[/tex]
It represents: The number of tents made in an hour
Step-by-step explanation:
Given
X=0,1,2,3,4,5,6,7,8
Y=6,7,8,9,10,11,12,13,14
Required
Determine the slope
The slope is calculated as:
[tex]Slope = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
Pick any two corresponding values of x and y
[tex](x_1,y_1) = (0,6)[/tex]
[tex](x_1,y_1) = (8,14)[/tex]
[tex]Slope = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]Slope = \frac{14 - 6}{8 - 0}[/tex]
[tex]Slope = \frac{8}{8}[/tex]
[tex]Slope = 1[/tex]
It represents: The number of tents made in an hour
there are 20 orange and purple pencils. the number of orange pencils is 1 less than 2 times the number of purple pencils. how many orange and purple pencils are their?
Answer:
im so srry 25 im not sure
Step-by-step explanation:
i need points :(
Ava, Cara, Emma, Lily, and Mia are to be seated together in a row. If Emma and Lily must sit next to each other, how many different ways can the five girls be seated
Answer:
48 ways
Step-by-step explanation:
Given
[tex]Girls = \{Ava, Cara, Emma, Lily, Mia\}[/tex]
[tex]Together= \{Emma, Lily\}[/tex]
Required
Determine the number of sitting arrangements
The number of girls are 5, of which 2 must be seated together.
First, Emma and Lily can be arranged in 2! ways
Next, we consider Emma and Lily as one, so there are (5 - 1) girls left to be arranged.
This can be done in (5 - 1)! ways
Total number of ways is then calculated as:
[tex]Ways = 2! * (5 - 1)![/tex]
[tex]Ways = 2! * 4![/tex]
[tex]Ways = 2 * 1 * 4 * 3 *2 * 1[/tex]
[tex]Ways = 48[/tex]
Hence, there are 48 ways
The possible ways in which Ava, Cara, Emma, Lily, and Mia are to be seated together in a row, while Emma and Lily sit next to each other are 48 ways.
Given to us;
Number of girls = {Ava, Cara, Emma, Lily, and Mia} = 5 girls,
Also, Emma and Lily must sit next to each other, therefore, considering them as a single person,
The choices we are left with = {Ava, Cara, Mia, (Emma, Lily)} = 4 person;
We know to calculate the number of ways people can sit is given by n! (n factorial), where n is the number of person. Thus,
different ways this 4 person can sit = n!
= 4!
= 4 x 3 x 2 x 1
= 24 ways
Further, as given in the question Emma and Lilly must sit together but they can change sits within themselves, So,
different ways Emma and Lilly can sit = n!
= 2!
= 2 x 1
= 2 ways
Therefore, the total number of ways all 5 girls can sit together in which Emma and Lilly will be always seated together,
Total ways all can sit together = 24 x 2
= 48 ways
Hence, the possible ways in which Ava, Cara, Emma, Lily, and Mia are to be seated together in a row, while Emma and Lily sit next to each other are 48 ways.
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Y/9 + 5 = 0 ???????????
Answer:
[tex]y=-45[/tex]
Step-by-step explanation:
[tex]\frac{y}{9}+5=0[/tex]
[tex]\frac{y}{9}=-5[/tex]
[tex]y=-45[/tex]
is 50 prime or composite? Explain
Answer:
composite
Step-by-step explanation:
Answer:
50 is composite
Step-by-step explanation:
it is even:)
If you borrow $758 for two years at an interest rate of 6% how much Interest will you pay?
Answer:
$90.96
Step-by-step explanation:
any gymnast or cheerleader
Answer:
Cheerleader :))
Step-by-step explanation:
Water is flowing into a large spherical tank at a constant rate. Let V(t) be the volume of water in the tank and H(t) be the height of the water level at time t.
a) Give a physical interpretation of dV/dt and dH/dt.
b) Is dV/dt positive, negative, or zero when the tank is one-fourth full? Justify your answer.
c) Is dH/dt positive, negative, or zero when the tank is one-fourth full? Justify your answer.
Answer:
A) dV/dt = the rate of change of the given volume of water in the tank with respect to the time, t.
dH/dt = the rate of change of the height of the water in the tank with respect to the time
B) dV/dt is positive
C) dH/dt is positive
Step-by-step explanation:
We are given that;
V(t) is the volume of water in the tank and H(t) is the height of the water level at time t. Thus;
A) dV/dt = the rate of change of the given volume of water in the tank with respect to the time, t.
dH/dt = the rate of change of the height of the water in the tank with respect to the time
B) When the tank is one-fourth full, dV/dt is positive because the volume water in the tank is increasing with time.
C) when the tank is one-fourth full, dH/dt is positive because the height has increased from zero level to 0.25 times the height of the tank. Thus the height is increasing with time.
Kenny is ordering uniforms for both the girls' and boys' tennis clubs. He is ordering shirts for 43 players and two coaches at a total cost of $658.35. Additionally, he is ordering visors for each player at a total cost of $368.51. How much with each player pay for the shirt and visor?
Answer: 23.20 dollars
Cost for 1 shirt = $14.63
Cost for 1 visor = $8.57
Total = 14.63+8.57 = 23.20
==============================================================
Explanation:
s = cost of 1 shirt
v = cost of 1 visor
costs are in dollars
There are 43 players and 2 coaches that get a shirt. There are 43+2 = 45 people total that get a shirt. The amount of money spent on all the shirts is 45s because we multiply the number of people (45) with the cost per shirt (which is s). Set this equal to 658.35 and solve for s
45s = 658.35
s = 658.35/45
s = 14.63
Each shirt costs $14.63, and this is the amount each player should pay.
-------------------
Kenny is also ordering 43 visors. The total cost here is 368.51 dollars. This means the equation we need to solve is 43v = 368.51
Divide both sides by 43 to isolate v
43v = 368.51
v = 368.51/43
v = 8.57
Each visor costs $8.57, and this is the amount each player should pay.
-------------------
Add up the two costs we found and we get 14.63+8.57 = 23.20, which is the total cost each player must pay for both a shirt and a visor.
PLEASE I NEED HELP WITH MATH HW WITH EXPLANATION!!!
Question: Find the value of the varible
===================================================
Explanation:
For any triangle, the interior angles always add to 180
(angle1)+(angle2)+(angle3) = 180
(w) + (4w-6) + (w) = 180
(w+4w+w) - 6 = 180
6w - 6 = 180
6w - 6+6 = 180+6 .... adding 6 to both sides
6w = 186
6w/6 = 186/6 ..... divide both sides by 6
w = 31
------------------------------------
Extra info:
This value of w leads to
4w-6 = 4*31-6 = 118
The three angles of the triangle are: 31, 118, 31
Because we have two congruent angles, this means the triangle is isosceles. The sides opposite the congruent angles are the same length.
Scott likes to run long distances. He can run 20 \text{ km}20 km20, start text, space, k, m, end text in 858585 minutes. He wants to know how many minutes (m)(m)left parenthesis, m, right parenthesis it will take him to run 52 \text{ km}52 km52, start text, space, k, m, end text at the same pace.
How long will it take Scott to run 52 \text{ km}52 km52, start text, space, k, m, end text?
minutes
Answer:
Scott will take 221 minutes to run 52 km
Step-by-step explanation:
Speed
The speed of an object can be calculated with the formula:
[tex]\displaystyle v=\frac{d}{t}[/tex]
Where d is the distance traveled and t is the time taken.
Scott can run d=20 km in 85 minutes. Thus, his speed is:
[tex]\displaystyle v=\frac{20}{85}\ km/min[/tex]
Now he wants to know how many minutes it will take him to run d=52 km. Solving the formula for t:
[tex]\displaystyle t=\frac{d}{v}[/tex]
Since the speed has been already determined:
[tex]\displaystyle t=\frac{52}{\frac{20}{85}}[/tex]
Multiplying by the reciprocal of the denominator:
[tex]\displaystyle t=52*\frac{85}{20}[/tex]
t = 221 min
Scott will take 221 minutes to run 52 km
Answer:
221 min
Step-by-step explanation:
eligible on khan academy
please help ASAP! Thank you!
- World population in 2014 was estimated to have been 89614160,express it into billions
Answer:
Im a little confused what this question is asking, but the number in billions is simply 89.61416 if the original number is in thousands! Hope that helps and if that was not what you were looking for, let me know. :)
Step-by-step explanation:
Answer:
It is estimated that the population of the world reached one billion for the first time in 1804. It was another 123 years before it reached two billion in 1927, but it took only 33 years to rise by another billion people, reaching three billion in 1960.
Kyra opened a nail salon. For each manicure, Kyra charges $12. This week, Kyra has a goal of making a total of $200. Write an inequality that shows the minimum number of manicures that Kyra will need to give in order to meet her goal.
Carl reads 3 books every week. Rose reads 6 books a month. Lynn reads 85 books a year. Who reads the most books in a year?
Answer:
Carl
Step-by-step explanation:
There are 52 weeks in a year, and Carl reads 3 books a week, so he reads 3*52= 156 books a year. There are 12 months in a year, and Rose reads 6 books a month, so Rose reads 6*12=72 books a year. Carl reads the most books
What percentage of the food cost is the tip?
please help me asap
Answer: -18
Step-by-step explanation: if a=6 then the equation would be (6) - 24 which is -18
explanation pleasee!
Step-by-step explanation:
Triangles ABC and DEF are congruent.
The letter B is the 2nd letter in 'ABC'.
Likewise, the letter E is the 2nd letter in 'DEF'.
Therefore Angle B = Angle E.
I WILL MARK BRAINLEST!!! FOR YOU CAN ANSWER THESE TWO
Answer:
First question: 1.4
Second question: Option 3
Step-by-step explanation:
First question:
You simplify the left equation first,
-0.4 x -3.5 = 1.4 , -0.4 x 2.9 = -1.16
1.4k - 1.16
For this to equal the right equation, the number missing must be 1.4.
Second question:
You simplify the equation given to you first,
1/4 x 8 = 2 , 1/4 x 12 = 3
2x + 3
The option that is equivalent to the answer is option 3; 2x + 3
Rate me also give advice
No i am not growing out my hair it looks worse
My skin we clear in next few months currently taking Accutane
Contacts are not a option
.
Answer:
You look very nice!
Step-by-step explanation:
it matters what you look like to yourself not how you look to others!
What numerical coefficient of b on the right side of the equation makes the expressions equivalent? -3(-5b + 6) b-2
Answer:
-5
Step-by-step explanation:
coefficient of b is -5
In every right triangle there is exactly one ____.
Answer:
point
Step-by-step explanation:
Answer:
90 degree angle
Step-by-step explanation:
When a certain radioactive element decays, the amount, in milligrams, that remains after t years can be approximated by the function A above. Approximately how many years would it take for an initial amount of 800 milligrams of this element to decay to 400 milligrams?
a. 173
b. 347
c. 693
d. 1,386
e. 2,772
Answer: C.693
Step-by-step explanation: