can someone please help me with this
which quadratic equation has two solutions or zeros
Answers
Related Questions
You're a quality control manager in a fruit juice company. You want to choose
a sample size for a quality check on the cans used to package the juice. From
a batch of 30,000 cans, you want a sample size that will allow you to closely
approximate the population parameters for the entire batch. Which sample
size will most likely produce the least variability among different samples?
Answers
Answer:
246.
Step-by-step explanation:
a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78
b) The minimum sample size to achieve this is 246.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population(square root of the variance) and n is the size of the sample. So in this question,
The lower end of the interval is the sample mean subtracted by M. So it is 99 - 0.78 = 98.22
The upper end of the interval is the sample mean added to M. So it is 99 + 0.78 = 99.78.
a) The 95% confidence level two-tail confidence interval for the mean value of the key index of this batch is between 98.22 and 99.78
(b) (5 points) If we want the sampling error to be no greater than 0.5, what is the minimum sample size to achieve this based on the same confidence level with part (a)
We need a sample size of n
n is found when
Then
Rounding up
The minimum sample size to achieve this is 246.
You want to create a scale model for a building that will be 120feet tall and 40 feet wide. If you make the model 6 feet tall, how wide should it be?
Answers
Given:
Length of the building = 120 feet
Width of the building = 40 feet
Length of the model = 6 feet
To find:
Width of the model.
Solution:
The scale model similar to the original figure and the corresponding sides of the similar figures are proportional.
Let x be the width of the building.
[tex]\dfrac{\text{Length of the building}}{\text{Length of the model}}=\dfrac{\text{Width of the building}}{\text{Width of the model}}[/tex]
[tex]\dfrac{120}{6}=\dfrac{40}{x}[/tex]
[tex]20=\dfrac{40}{x}[/tex]
[tex]x=\dfrac{40}{20}[/tex]
[tex]x=2[/tex]
Therefore, the width of the model is 2 feet.
which table shows the relationship y=k/x where k is a real number
Answers
Answer:
the answer is 1/5 because y/x gives you k
Step-by-step explanation:
Mr. K was able to spot quite a few window washers on the skyscrapers there. He asked them how long it took to wash windows on such a building. They said that each person could wash 50 windows in 1 hour.
(How long would it take the 3 workers to wash all 1000 windows on one of the skyscrapers?)
Answers
Answer:
6.7 hours
Step-by-step explanation:
If one can do 50 then three can do 150.
So 1000÷150=6.66666666666
Hope this helps
Type the correct answer in each box. Use numerals instead of words.
Bethany collected 200 survey responses regarding recycling behaviors in her city of those responses, 174 people responded that they
participate in the city's recycling program.
Use this information to complete the statement. Round all answers to the nearest hundredth.
, which means that
% of the people surveyed do not participate in the city's
The approximate sample proportion is
recycling program.
Answers
Answer:
Step-by-step explanation:
Answer:
1st one 0.87
2nd one 13
PLATO
Step-by-step explanation:
Kensington charges $20 per hour, h, teaching music lessons. Last year, Kensington earned $37,705, including tips, t. Given this information, which of the following equations can be used
the amount Kensington made in tips last year?
Of=37705 + 20h
O t = 37705 - 20h
Ot=37705h + 20
O = 37705h - 20
Answers
Answer:B-t=37705-20h
Step-by-step explanation:The answer is B because you need to get rid of all of the money she made working so you subtract 20 by how ever many hours she has worked
Answer:
Second option : t = 37705 - 20h
Step-by-step explanation:
I took the test
if a hockey ticket regular cost $25 and the sale price cost $20
Answers
Answer:
The sale price would be 20% off.
Step-by-step explanation:
I hope this helps! Have a great rest of your day!
P deceased by the total of q and r
Answers
Answer:
P deceased by the total of q and r
Answer:
The answer is: p-(q+r)
Hope that helps. I just did it on my test and I got it right :D
Theo rolls a dice 306 times.
Work out an estimate for the number of times Theo rolls an even number
Answers
To secure a telephone pole, a steel cable will be attached to a ring on the pole 12 feet above the ground. If the cable is 15 feet long, how far from the base of the pole will the other end of the cable be anchored?
Answers
Answer:
9 ft
Step-by-step explanation:
Pythagorean theorem:
x = the square root of 15 square minus 12 square
x= square root of 225-144
x= square root of 81
X = 9
Help me out, math is irritating
Answers
Answer:
67958.93228
Step-by-step explanation:
Please answer correctly and no links pls
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Answer: 13.) 49, 14.) 64
Step-by-step explanation:
7x7=49, 8x8=64
I need help btw i am in middle school
Answers
NAHHHHHH THATS 4TH GRADE MATH HOLLL UP
Answer:
1 is 2/5 youre correct
2 is 1/3
3 is 2/3
4 is 3/5
hope this help
Can you help me with this like explain how and stuff, Please?
Answers
Answer:
Step-by-step explanation:I belive that the 7x+22 needs to equal 50 because they opposite angles. Hope this helped a little and can get you started
Answer:
22.57
Step-by-step explanation:
7x+ 22 =180 180 because its a supplimentary angle -22 from 22 and 180 22 and -22 cancel out the 180 - 22 = 158
then you have 7x = 158 divide both numbers by 7 to isolate x then divide 158 by 7 = 22.57
What is the perimeter, to the nearest hundredth of a unit, of polygon
ABCDE ?
Answers
Step-by-step explanation:
answer is 20.31
I'm positive
pls help me its pls——
Answers
Answer:
Sorry but I love you
Step-by-step explanation:
PLEASE HELP ME A soccer field is bordered on three sides by a parking lot of width x. The total length of the field and parking lot is 300 m, and the total width is 200 m.
The area of the field is 30.000 m². How wide is the parking lot?
Answers
Answer:
Step-by-step explanation:
Assuming the parking lot is along both widths of the field and only once along the length:
the length is (300 - 2x)
the width is (200 -x)
the area is (300-2x)(200-x) = 30000
60000 -300x - 400x +2x^2 = 30000
2x^2 -700x + 30000 = 0
x^2 - 350x + 15000 = 0
(x - 300 )(x - 50 ) = 0
x = 300 or x=50
x=300 results in negative measures.
the parking lot is x=50 wide
the length of the field is 200, the width of the field is 150
help please!!! just need to answer numbers 1-3 thank you to whoever helps !! :)
Answers
Answer:
1) Area = ½ b × h
= ½ × 6 × 4
= 12
2) Area = ½b × h
= ½ × 3 × 4
= 6
3) Area = ½b × h
= ½ × 4 × 7
= 14
!!!! HELP PLEASE !!!!!
Answers
Answer:
C) x² + 2x - 6
Step-by-step explanation:
add 2x +1 to x² - 7
What’s the answer? PLEASE ! NO LINKS. thanks !
Answers
Answer:
84 [tex]cm^{2}[/tex]
Step-by-step explanation:
find the area of each shape and add them together
Can someone please help me with math.
Answers
The elevator at the state capital has a maximum weight capacity of 2000 pounds. If there are 3
people already on the elevator with a combined weight of 428 pounds, write an inequality to express
the possible weights that may be added to the elevator,
Part A: Define your variable
Part B: Write the inequality
Part C: Describe what your inequality looks like on a number line. Be sure to include whether the
circle is open or closed and the direction the line is shaded.
Answers
Answer:
Step-by-step explanation:
Maximum capacity of the elevator = 2000 pounds
Combined weight of the elevator = 428 pounds
A). Let the possible weights that can be added to the elevator = w pounds
B). Therefore, inequality representing this situation will be,
428 + w < 2000
C). By solving the given inequality,
(428 + w) - 428 < 2000 - 428
w < 1572 pounds
Now we draw this inequality on a number line.
Three fourths divided by nine
Answers
Answer:
0.1
Step-by-step explanation:
Divide 3/4 by 9 which will leave you with 0.083 repeated but if you estimate to the closest decimal that will bring you to 0.1 as your final answer.
Two pyramids are similar. The volume of the larger pyramid is 125 mº and the volume of the smaller pyramid is 27 mº. The height of the smaller pyramid is 3 m What is the height of the larger pyramid? Enter your answer in the box.
Answers
Answer:
5 m
Step-by-step explanation:
[tex]\sqrt[3]{125}[/tex] = 5
Answer:
5m
Step-by-step explanation:
trust me?
115 divided by 356................
Answers
Answer:
0.32
:)
brainliest greatly appretiated
Factor each expression completely
4x² + 6x – 40
Show your work!!!
NO LINKS PLS
Answers
Answer:
4x²+6x-40
2(2x²+3x-20) factor out 2
2(2x²+8x-5x-20) split the three into a difference
2(2x(x+4)-5x-20) factor the 2 out of first pair of parenthesis
2(2x(x+4)-5(x+4)) factor the 5 out of second pair of parenthesis
2(x+4)(2x-5) factor
= 2(x+4)(2x-5)
Step-by-step explanation:
i hope this helps :)
For any number n>1, is
|(5 – 3i)^n|
A. greater than 1?
B. less than 1?
C. equal to 1?
Answers
Answer:
A.greater than 1
Step-by-step explanation:
1. take away all the symbols
2. 5-3
3.5-3=2
4. is 2 greater than 1
5. yes
6. answer is A.
Select the expression that has a value of 28. (4 points)
Group of answer choices
8 + (4 x 6) ÷ 2 + 7
8 + 4 x 6 ÷ (2 + 7)
(8 + 4 x 6) ÷ 2 + 7
(8 x 4) + 6 ÷ 2 − 7
Answers
Answer:
(8 + 4 × 6) ÷ 2 + 7
Step-by-step explanation:
8 + (4 × 6) ÷ 2 + 7 = 27
8 + 24 ÷ 2 + 7
8 + 12 + 7
27
8 + 4 × 6 ÷ (2 + 7) = [tex]10\frac{2}{3}[/tex]
8 + 4 × 6 ÷ 9
8 + 24 ÷ 9
[tex]8 + 2\frac{2}{3}[/tex]
[tex]10\frac{2}{3}[/tex]
(8 + 4 × 6) ÷ 2 + 7 = 23
(8 + 24) ÷ 2 + 7
32 ÷ 2 + 7
16 + 7
23
(8 × 4) + 6 ÷ 2 − 7 = 28
32 + 6 ÷ 2 - 7
32 + 3 - 7
35 - 7
28
Answer:
D
Step-by-step explanation
D
D
How many lines of symmetry does the figure have?
a. Lines of symmetry: 0
b. Lines of symmetry: 1
C. Lines of symmetry: 2
d. Lines of symmetry: 3
Answers
Answer:
1
Step-by-step explanation:
Pls HELP!! it is factoring PST answer with explanation please!!!!!! 30 points!
Answers
Step-by-step explanation:
these are the answers of your questions
Answer #1:
x ( 3 x − 4 ) ²
Answer #2( [tex]\frac{x}{2}[/tex] − 5 ) ²