Answer:
160°
Step-by-step explanation:
The formula below gives the measure of an interior angle of a regular polygon of n sides.
[(n - 2)180]/n
[(18 - 2)180]/18
16(10)
160
Answer: 160°
What is the surface area?
8 ft
8 ft
8 ft
square feet
Answer:
surface area of cube=6×side²
surface area of cube=6×(8ft)²
surface area of cube=384ft²
what is equivalent to (x+8)(x+4)?
1.x^2+12x32
2.2x^2+10x+12
3.2x^2+12x+16
Answer:
1. x^2+12x+32
Step-by-step explanation:
(x+8)(x+4)
x(x+4)+8(x+4)
x^2+4x+8x+32
x^2+12x+32
Answer:
x^2+12x + 32
Step-by-step explanation:
Lets solve this piece by piece
x * x = x^2
x*4 = 4x
8 * x = 8x
8*4 = 32
now if we add all of these we get
x^2 + 12x + 32
which happens to be the first option
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
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
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
Answer:
The answer is B, 14.
Step-by-step explanation:
Answer: 14
Step-by-step explanation: I took the test and got it correct :)
Find the measure of angle b.
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:
11. Patrick is buying a new car. He can choose the body style, color, and
engine type. If there are 54 ways he can select a car, with three body
styles and two engine choices, how many colors are available?
Answer:
There are 9 different options he can choose
Step-by-step explanation:
$6,000 was invested at a simple interest rate. In 15 years, the
account was worth $9,600. What was the interest rate? Show all your
work!
Answer:
4.2%Step-by-step explanation:
S.I=P×R×T R=I×100/R×T =6000×100/9600×15=600000/144000
=4.2%
How long is a string reaching from the top of a 13-ft pole to a point on the 3 points ground that is 7 ft from the base of the pole?
Answer:
14.76 ft
Step-by-step explanation:
L²= 13² + 7²
L² = 169 + 49 = 218
L = √218 = 14.76 ft
Answer:
14.8
Step-by-step explanation:
We use the Pythagoras theorem because the string and the pole are making a right angle triangle
7^2+13^2=c^2
49+169=c^2
218=c^2
14.8=c
A trout swam at a steady speed for 1.5minutes. It swam 9,900 centimeters in that time. What was its speed?
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.
find the equation of the line passing through points (-4,2) and (1,-6)
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
Propane has a heat energy of 2,470 BTU/ft cubed. How much energy can a propane tank with a volume of 43.7 ft cubed produce?
Answer: [tex]107939\ BTU[/tex]
Step-by-step explanation:
Given
Propane produced heat energy of [tex]2470\ BTU/ft^3[/tex]
The volume of the tank is [tex]43.7\ ft^3[/tex]
The energy produced by this propane tank is
[tex]\Rightarrow 2470\times 43.7=107939\ BTU[/tex]
A ladder is placed 5ft away from a house. The ladder comes up to 12ft on the
side of the house. How long is the ladder?
Answer:
c = 13
Step-by-step explanation:
a² + b² = c²
5² + 12² = c²
25 + 144 = c²
169 = c²
√169= √c²
13 = c
Which number below is greater than 9 but less than 10? A. √ 45 B. √ 80 C. √ 85 D. √ 100
Answer:
C: 85
Step-by-step explanation:
its about 9.2
In a race , Ram covers 5 km in 20 min. How much distance will he cover in 100 min
Answer:
25 km
Step-by-step explanation:
100/20=5
5*5=25
What is the equation of the ine perpendicular to 6x−2y=3 and passing through the point (5,−1)?
6x-2y=4xy
so this is the,correct answer your thinking of division
Find the median:
5, 6, 3, 9, 0, 4, 1, 2, 7
a
4
b
5
c
4.1
d
4.3
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
Find the number of possible outcomes in the sample space for the following scenario: A spinner can land on either red or blue. You spin seven times and then roll a six-sided die.
A. 423
B. 500
C. 692
D. 768
Which is correct?
What does side DE equal?
first person gets brainliestly answer!
Answer:
Length of line DE = 20
Step-by-step explanation:
The scale factor from ΔABC to ΔDEF is 2.
Line AB is similar to line DE.
So, we need to multiply the length of line AB by 2 to get the length of line DE:
10 × 2 = 20
y=x²+16x+63
plz help im confusing myself on this problem plz show work to thx for the help
Answer:
\frac{d}{dx}\left(x^2+16x+63\right)=2x+16
Step-by-step explanation:
How do you find the diameter
Answer:
2x radius I believe
Tell me if im wrong and I will remove this
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.
Answer:
2400
Step-by-step explanation:
a box has six sides
400*6
Jeremy has $3.50 to purchase erasers. If erasers cost $0.21 each, about how many can he buy?
Answer:
16 brainlist pls
Step-by-step explanation:
***MARKED BRAINLIEST***
Answer:
D is the answer
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.
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
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.
Answer:
The answer is $3600 I hope this is helpful.
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.
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)
Simplify the expression by applying the distributive property and then combining like terms
5(2 + 5) +9
+
NO LINKS!! SOMEONE PLS HELP ME :( NOBODY DOESNT WANT TO HELP ME I POSTED THIS SO MANY TIMES AND NO ANSWER PLSSS HELP ME The slope of the line below is 1. Write the point-slope equation for the line
using the coordinates of the labeled point. (7,8)
Answer:
Answer: y - 8 = x - 7
Step-by-step explanation:
SOLUTION:
General equation : (y2 - y1)/(x2 - x1) = slope
.
Substitute slope = 1 into the equation:
(y2 - y1)/(x2 - x1) = 1
.
Substitute (7, 8) into the equation:
(y - 8)/(x - 7) = 1
.
Cross multiply:
y - 8 = x - 7
.
Answer: y - 8 = x - 7
I really hope dis Helps :D
Using the question from above Jenny shape what is the volume of her two cubes combined
Answer:
14•14•14= 2744
7•7•7= 343
2744+343= 3087
Step-by-step explanation:
all together it should be 3087
sorry if I'm wrong.
If the number of bacteria in a colony doubles every 33 hours and there is currently apopulation of 50,000 bacteria, what will the population be 66 hours from now?
Answer:
200,000
Step-by-step explanation:
Population now: 50,000
Population in 33 hours: 100,000
Population in 66 hours: 200,000
Answer: 200,000