Answers
Answer:
solutions at -1 and 11
Step-by-step explanation:
(-b ± √b²-4ac) / 2a
in this problem, a = 1, b = -10, c = -11
(10±√100-4(-1)(-11)) / 2(1) =
(10 + √144) / 2 = 22/2 = 11
(10 - √144) / 2 = -2 / 2 = -1
Related Questions
Find the median:
5, 6, 3, 9, 0, 4, 1, 2, 7
a
4
b
5
c
4.1
d
4.3
Answers
Answer:
A
Step-by-step explanation:
The median of 5, 6, 3, 9, 0, 4, 1, 2, 7 is 4
How to determine the median?We have:
5, 6, 3, 9, 0, 4, 1, 2, 7
Rearrange the dataset in ascending order
0, 1, 2, 3, 4, 5, 6, 7, 9
The median is the middle value, and the middle value in the above dataset is 4
Hence, the median of 5, 6, 3, 9, 0, 4, 1, 2, 7 is 4
Read more about median at:
https://brainly.com/question/14532771
#SPJ6
***MARKED BRAINLIEST***
Answers
Answer:
D is the answer
Step-by-step explanation:
Hi please help I have no confidence or motivation at this point and I just don't wanna fail. Thank you.
1. To determine if "A" students tend to sit in a particular part of the classroom, a teacher recorded the locations of the students who received grades of A. He found that 17 sat in front, 9 sat in the middle, and 5 sat in the back of the classroom, when testing the assumption that the "A" students are distributed evenly throughout the room, he obtained the test statistic of x2 = 7.226. If using a 0.05 significance level, is there sufficient evidence to support the claim that the"A" students are not evenly distributed throughout the classroom? Then state the conclusion.
A. Fail to reject the null hypothesis; there is sufficient evidence to support the claim that the A" students are not evenly distributed throughout the classroom.
B. Fail to reject the null hypothesis; there is sufficient evidence to support the claim that the "A" students are evenly distributed throughout the classroom.
C. Reject the null hypothesis; there is sufficient evidence to support the claim that the "A" students are not evenly distributed throughout the classroom.
D. Reject the null hypothesis; there is sufficient evidence to support the claim that the "A students are evenly distributed throughout the classroom.
----
4. After getting several "flat tire" excuses for missed tests, a college instructor asked her 40 students to identify the tire they would select for their excuse and recorded the results in a frequency table with the following categories: left front, right front, left rear, and right rear. If you are using a 0.05 significance level to test a claim that the results fit a uniform distribution, what is the critical value for the goodness-of-fit test needed to test the claim?
A. 7.815
B. 55.758
C. 9.488
D. 43.773
----
7. An experiment is performed using 1000 trials to test a new scientific model. There are 10 different categories of outcomes. When testing the claim that the observed outcomes agree with the expected frequencies, a test statistic is found to be χ2 = 8.185. Use a 0.05 significance level to test the claim that the actual outcomes agree with the expected frequencies. State the conclusion.
A. Fail to reject the null hypothesis; there is sufficient evidence to warrant rejection of the claim that the observed outcomes agree with the expected frequencies.
B. Reject the null hypothesis; there is not sufficient evidence to warrant rejection of the claim that the observed outcomes agree with the expected frequencies.
C. Reject the null hypothesis; there is sufficient evidence to warrant rejection of the claim that the observed outcomes agree with the expected frequencies.
D. Fail to reject the null hypothesis; there is not sufficient evidence to warrant rejection of the claim that the observed outcomes agree with the expected frequencies.
----
8. A wedding caterer randomly selected clients from the past few years and recorded the months in which the wedding receptions were held. She was interested in testing a claim that weddings occur in different months with the same frequency. She found the test statistic to be χ2 = 10.600. Use a 0.05 significance level to find the critical value for the goodness-of-fit and test the claim that weddings occur in different months with the same frequency. Then state the conclusion.
A. 19.675; reject the null hypothesis
B. 21.026; reject the null hypothesis
C. 19.675; fail to reject the null hypothesis
D. 21.026; fail to reject the null hypothesis
----
10. A candy company claims that the colors of the candy in their packages are distributed with the (1 following percentages: 16% green, 20% orange, 14% yellow, 24% blue, 13% red, and 13% purple. If given a random sample of packages, using a 0.05 significance level, what is the critical value for the goodness-of-fit needed to test the claim?
A. 12.592
B. 15.822
C. 12.833
D. 11.071
Answers
Answer:
1) C. reject the null hypothesis; there is sufficient evidence to support the claim that “A” the students are NOT evenly distributed throughout the classroom
4) A. 7.815
7) D. fail to reject the null hypothesis; there is not sufficient evidence
i’m sorry my test doesn’t have questions 8 and 10 so i don’t know the answer
Step-by-step explanation:
i just took the test
The first two angles in a triangle are 90 degrees and 50 degrees. What does the third angle have to be?
A. 20 degrees
B. 40 degrees
C. 50 degrees
D. 90 degrees
Answers
Answer:
B) 40 degrees
Step-by-step explanation:
90 + 50 = 140
Each triangle have 180 °
180 - 140 = 40
find the equation of the line passing through points (-4,2) and (1,-6)
Answers
Answer:
y + 6 = (-8/5)(x - 1) in point-slope form
Step-by-step explanation:
Moving from the 1st point to the first, we see that x (the 'run') increases by 5 from -4 to 1, and y (the 'rise') decreases by 8. Thus, the slope of the line through these two points is m = rise / run = -8/5
Now we have two points on the line, plus the slope. Let's write out the point-slope formula for the equation of a straight line:
y - k = m(x - h), where (h, k) is a point on the line and m is the slope of the line.
Here, using the point (1, -6), we obtain:
y + 6 = (-8/5)(x - 1) in point-slope form
2. 144 in.
C
yd
Pls someone help I have a test tomorrow
Answers
what are you asking im confused
144 inches = 4 yards
Explanation:
There are 36 inches in one yard. So, 144 over 36 equals 4.
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 530 college students showed that 21% of them had, or intended to, cheat on examinations. Find the 95% confidence interval for the population proportion. Round to four decimal places.
Answers
Answer:
(0.1753 ; 0.2447)
Step-by-step explanation:
Using the relation :
Confidence interval :
p ± margin of error
p = 0.21
1 - p = 0.79
n = 530
Zcritical at 95% confidence level = 1.96
Margin of Error : Zcritical * sqrt[(p(1-p))/n]
1.96 * sqrt[(0.21(0.79))/530]
1.96 * 0.0176923 = 0.0346769
Margin of Error = 0.0346769
Lower boundary = 0.21 - 0.0347 = 0.1753
Upper boundary = 0.21 + 0.0347 = 0.2447
Confidence interval :
(0.1753 ; 0.2447)
Find the measure of angle b.
Answers
Answer:
Uh it's 46 I think since it's the same size as the one on the opposite side of it sorry if I'm wrong cri
Step-by-step explanation:
I need the answer for 15 please.
Answers
Answer:
46
Step-by-step explanation:
I think the answer Is 46 I'm not 100% sure though but I do think it is 46
Simplify the expression by applying the distributive property and then combining like terms
5(2 + 5) +9
+
Answers
A furniture store sells kits that customers use to build cabinets. Each kit contains 18 screws and a
set number of boards.
Part A
Jarred buys 6 of these kits and has a total of 192 screws and boards. The equation shown represents
this situation.
6(x + 18) = 192
What is the value of x in Jarred's equation?
A. 11
B. 14
C. 29
D. 35
Answers
Answer:
The answer is B, 14.
Step-by-step explanation:
Answer: 14
Step-by-step explanation: I took the test and got it correct :)
PLEASE HELP! Find the midpoint given (0,11) and (-6,3).
Answers
Answer:
(- 3, 7 )
Step-by-step explanation:
Given endpoints (x₁, y₁ ) and (x₂, y₂ ) then the midpoint is
( [tex]\frac{x_{1}+x_{2} }{2}[/tex] , [tex]\frac{y_{1}+y_{2} }{2}[/tex] )
Here (x₁, y₁ ) = (0, 11) and (x₂, y₂ ) = (- 6, 3) , then
midpoint = ( [tex]\frac{0-6}{2}[/tex], [tex]\frac{11+3}{2}[/tex] ) = ( [tex]\frac{-6}{2}[/tex], [tex]\frac{14}{2}[/tex] ) = (- 3, 7 )
Answer:
(-3,7)
hope it helps........
A bookmark is shaped like a rectangle with a semicircle attached at both ends. The rectangle is 15 cm long and 4 cm wide. The diameter of each circle is the width of the rectangle. What is the area of the bookmark? Use 3.14 for pi
Answers
Answer:
The area of the rectangle is Length x width. So 12x4 would =48 sq cm. The area of the circle is ( 3.14 ) x r2.
The area of the circle would be = (3.14)x2^2)=12.56 cm sq.
So the total area is= Area of rectangle +Area of circle
TA=48+12.56
TA=60.56 sq cm
:)
Why do liquids have to be poured into containers before they can be measured?
1.The container has numbers on it.
2.It would spill if not in a glass.
3.Liquids do not have a definite shape.
witch one
Answers
Beverly makes wooden boxes for a crafts fair. She makes 400 boxes like the one shown, and she wants to paint all the outside faces.
Answers
Answer:
2400
Step-by-step explanation:
a box has six sides
400*6
A trout swam at a steady speed for 1.5minutes. It swam 9,900 centimeters in that time. What was its speed?
Answers
Answer:
6,600 cm per minute
Step-by-step explanation:
I got 6,600 by taking 9,900 divided by 1.5 minutes because it took the trout 1.5 minutes to swim 6,600 cm. 9,900/1.5= 6,600. So, the trouts was swimming at a speed of 6,600 cm per minutes.
PLZ help me on this ASAP which one is it??? Its due in a couple of mins :(((
Answers
Answer:
answer two solution
Step-by-step explanation:
. Given that AOC is a straight line, find the value of x in the following figure.
. Given that AOC is a straight line, find the value of x in the following figure.
. Given that AOC is a straight line, find the value of x in the following figure.
Answers
Answer:
where is the a or c
Step-by-step explanation:
where is the A and C... it is cut...I can't see it
I play a gambling game in which I will win different amounts of money with different likelihood's. Suppose that I win X dollars with a probability of P(X) (if C is negative I am losing money). The distribution is as follows: what is the appropriate value of P?
Answers
Answer:
[tex]p = 0.05[/tex]
Step-by-step explanation:
Given
See attachment for the distribution
Required
Find p
To find p, we make use of:
[tex]\sum P(x) = 1[/tex]
So, we have:
[tex]0.50 + 0.25 + 0.13 + 0.07 + p = 1[/tex]
[tex]0.95 + p = 1[/tex]
Make p the subject
[tex]p = 1 - 0.95[/tex]
[tex]p = 0.05[/tex]
Which expression is equivalent to
Answers
Answer:
B) x^(5/3)*y^(1/3)
Step-by-step explanation:
Taking the cube root of a number is the same as raising it to the 1/3 power:
∛x=x^1/3
∛(x⁵y) = x^(5(1/3))*y^(1/3)=x^(5/3)*y^(1/3)
Remember to multiply exponents when raising an exponent to an exponent and distribute the 1/3 to each exponent!
Jeremy has $3.50 to purchase erasers. If erasers cost $0.21 each, about how many can he buy?
Answers
Answer:
16 brainlist pls
Step-by-step explanation:
y=x²+16x+63
plz help im confusing myself on this problem plz show work to thx for the help
Answers
Answer:
\frac{d}{dx}\left(x^2+16x+63\right)=2x+16
Step-by-step explanation:
i need help
Find the volume of the cylinder.
Either enter an exact answer in terms of
π
πpi or use
3.14
3.143, point, 14 for
π
πpi.
Answers
Answer:
Solution :-Radius is 3
Height is 2
So,
Volume = πr²h
Volume = 3.14 × (3)² × 2
Volume = 3.14 × 9 × 2
Volume = 3.14 × 18
Volume = 56.5 units²
Answer: 56.52
Step-by-step explanation:
You can get a volume of a cylinder by multiplying pie which is 3.14 by radius squared multiplied the height...
The equation is Volume = πr²h
Or in simpler terms:
3.14 × radius ×radius × height
So the final equation is:
3.14 × 3² × 2
=56.52
Who was the first lady
Answers
Answer:
While the title was not in general use until much later, Martha Washington, the wife of George Washington, the first U.S. president (1789–1797), is considered to be the inaugural first lady of the United States. During her lifetime, she was often referred to as "Lady Washington".
plz can i get brainliest
Answer:
there are many first lady's but because you said was like past tense the last first Lady was Melania Trump. the current first Lady is Jill Biden! I hope this helps!!♡♡
Vinny has 4 gallons of lemonade. How many -gallon glasses can Vinny fill with the lemonade?
А.
glass
45 glasses
B
с
24 glasses
D
32 glasses
Answers
Can someone help me please ☺
Find the cost of fencing a park with the length of 175 meters and a width of 125 meters. The cost is $12. per meter.
Answers
Answer:
The answer is $3600 I hope this is helpful.
calculate the following -50(20-25)+30(-10+7)-20(+16+12)
Answers
Answer:
-400
Step-by-step explanation:
Find the area.
A. 188 in.2
B. 278 in.2
C. 322 in.2
D. 250.5 in.2
Answers
Hey if anyone could help it would be much appreciated
Answers
Answer:
I think it is 0.029
Step-by-step explanation:
I think sorry if its wrong
Answer:
the answer is 0.028 hope it helps
Brainiest and 35 points for first correct answer. Purposely wrong answers will be deleted and reported, as well as wrong and guessed answers. Thank you.
Points A and B have opposite x-coordinates but the same y-coordinates.
On a coordinate plane, point A is 2 units to the left and 3 units up. Point B is 2 units to the right and 3 units up.
How many units away are each of the points from the y-axis?
2
3
4
5
Answers
Answer:
they are 4 unit away from the Y axis because you are counting the square units from Y not the lines across.
Answer:
4Step-by-step explanation:
Asynchronous between the variables y and x "
If for the equation
(i) If D, = 12 and D = 4, then find the value of x.
(ii) If D = -3 and D, = 6, then find the value of '.
The fermentation is 4