Answer:
c
Step-by-step explanation:
The table shows the number of practice problems completed in 30 minutes in three samples of 10 randomly selected math students. Number of practice problems completed In 30 minutes
Sample 1 18 15 17 17 18 | 13 | 17 16 | 16 | 14 | 18 Mean = 16.2
Sample 2 21 20 18 20 19 19 20 21 21 20 Mean = 19.9
Sample 3 | 14 16 18 13 | 18 | 16 | 16 | 17 | 19 | 19 Mean = 16.6
Which statement is most accurate based on the data?
A. A prediction based on the data is reliable, because the means of samples 1 and 3 are very close together.
B. A prediction based on the data is not completely reliable, because the means of samples 1 and 3 are too close together.
C. A prediction based on the data is reliable because there are no noticeable differences among the samples
D. A prediction based on the data is not completely reliable because the meaning of sample 2 is noticeably higher than the means of the other two samples. : ))
Answer:
D
Step-by-step explanation: please give me brainlist Thanks!
Sally can paint a room in 9 hours while it takes Steve 5 hours to paint the same room. How long would it take them to paint the room if they worked together?
Answer: About 3 hours and 5 minutes to paint the room together.
Step-by-step explanation:
Sally can paint 1/5 of the room in an hour and Steve can paint 1/8 of the room in an hour.
Room/Hour
1/5 ± 1/8 =8/40
8/40+5/40=13/40
How long to paint the room?
13/40 x 1= 40/13
40÷13=3.0777
So the answer will be Sally and Steve can paint the room in about 3 hours and 5 minutes
If I need to pour a cement sidewalk five feet wide and 250 feet long, the cost of the cement is 30 afoot, what will I have to pay.
Answer:
$37500
Step-by-step explanation:
Given data
Width of side walk= 5ft
Lenght= 250ft
Cost per square foot= $30
Hence the area of the side walk= 5*250
= 1250ft^2
Hence the cost = 30*1250
=$37500
what a quadrilateral with four equal sides, four equal angles, and all angles are right angles.
Answer:a square
Step-by-step explanation:
Amy plans to buy a pair of shoes for $78.99 and 2 shirts for $21.98 each. If the sales tax rate is 6%, what is reasonable for her total purchase amount?
Isaac finished eight of the ten homework problems. Phil has finished of the homework. How many more problems did Isaac finish?
Answer:
-2
Step-by-step explanation:
If Issac has finished 8/10 problems in the homework, and Phil has completed all of it, it can be concluded that Phil completed 10/10. 10/10 would equal a whole, or in this case, the entire homework. If Issac completed 8 problems, and Phil completed 10, subtract both values to find that Issac completed -2 more problems than Phil.
*correct me if I'm wrong, or If I didn't fully understand your question, because I am a little confused with how much homework Phil has finished.
help for my math homework
16 x 7 = (10x7) + (6 x p)
What is the surface area of this composite solid?
Use 11.3 meters for the slant height of the triangular prism.
Enter your answer in the box.
__m²
Composite made up of a rectangular prism surmounted by a triangular prism. The rectangular prism has dimensions of 16 meters wide by 20 meters long by 12 meters high. The triangular prism has dimensions of 16 meters wide by 20 meters long with a triangular altitude of 8 meters high.
Answer:
1764 m²Step-by-step explanation:
Refer to attached picture.
All given dimensions are given on the picture (not to scale).
Since altitude of the triangle and slant height is given, we can find the base of the triangle using Pythagorean:
[tex]b/2 = \sqrt{11.3^2-8^2} = \sqrt{64} = 8m, \\b = 16 m[/tex]It has 9 faces and the total surface area is:
S = 16*20 + 2(20*12) + 2(20*11.3) + 2(16*12) + 2(1/2*8*16) = 1764 m²PLEASE HELPPPP !!!!!!!
Answer:
first
Step-by-step explanation:
(3;0)
y(3) = 2/3 * 3 - 2 = 0
(0;-2)
y(0) = 2/3 * 0 - 2 = -2
Kalinda is 68.7 inches tall and wants to know how many inches taller she is than Terrence. If t represents Terrence’s height in inches, which expression can she use to find the answer?
68.7 minus t
StartFraction t Over 68.7 EndFraction
StartFraction 68.7 Over t EndFraction
t minus 68.7
Answer:
68.7 minus t.
Step-by-step explanation:
"How Many Inches Taller She is THAN Terrence."
You would subtract her height by his height. If you were to add the answer you get from 68.7 - t plus Terrences height, you would get how many inches taller she is than him
Answer:
A
Step-by-step explanation:
Convert 3/4 into a percent
Answer:
[tex] \frac{ 3}{4} \times 100\% \\ 75\%[/tex]
Please help! I will give brainliest!
Answer:
the answer is: B thank me later!
Answer:
a.option is the correct answer right
20a³-20a²+5a=?
-9x²+6x-1=?
-12a²+24ma-12m²=? 6a²-24a⁴+24a⁶=?
7x²+7y⁴-14y²=?
Answer:
5a^6,-3x^3-1
Step-by-step explanation:
we subtract the base and add the exponent
The measure of angle 5x/6 is . The equivalent measurement in degrees is
Answer:
17
Step-by-step explanation:
it is a polygon with 3 sides and 3 angles
Answer:
A triangle is that polygon with three side and three Angles
if the total surface area of lidless cubical box is 90 cm square find the length of edge of the box
Answer:
√18
Step-by-step explanation:
Ok, there's 5 squares that make up the box since the top's missing, so do:
90/5 --> 18
Since squares are simply length^2 to get the area, square root this value to give you your answer for each side length of this box:
√18
Two hundred students were polled on their preferred theme for prom. Find the approximate value of the chi-square test statistic.
Males Females
Evening in Paris 89 30
Vintage Disco 32 18
Enchanted Gardens 15 16
1: 8.37
2: 8.73
3: 2.57
4: 2.75
Answer:
8.37
Step-by-step explanation:
dont know but i know this is correct!
give two examples of organism that has cell structure similar to cell of permanent alide
How much cash did Vera receive?
Use the sample deposit ticket to answer a question.
$80.00
$456.32
$664.38
$1040.70
Compare your statistics from region to region.
Answer:
The province of La Union registered lower fisheries production in 2nd quarter 2018 as compared with the level a year ago.
explanation:hope it helps.❤️
#carryonlearning
Will Give Brainliest,. Make Sure to Show your work.
Answer:
540
Step-by-step explanation:
All you have to do is multiply all of the numbers on the upside of the shape
Answer:
24 unit^2.
Step-by-step explanation:
Area = 1/2 * base * height
= 1/2 * 12 * 4
= 1/2 * 48
= 24 unit^2.
In a right triangle, the hypotenuse has endpoints P(–3, 2) and Q(1, –3). If R represents the third vertex in the triangle and R is located in the third quadrant, what is the length of PR?
PR = 5 units.
Step-by-step explanation:Given:
Right triangle
Hypotenuse = P(–3, 2), Q(1, –3)
R = located in the third quadrant.
To calculate the length of PR,
(i) First make a sketch of the points P and Q. The diagram is attached to this response.
(ii) As shown in the diagram, the point R is located in the third quadrant and its distance from P is from point -3 to 2 on the y-axis.
There are 5 points between -3 and 2. Therefore, the length PR = 5 units
cosine angle B (geometry, right triangles- giving brainliest and thanks to all!)
Answer:
10/6 is the answer
cosine=hypotenuse/opposite
Step-by-step explanation:
Alice is searching online for tickets to a knicks game. Two weeks ago, the cost was $30. Now the cost is $39. What is the percent increase
Given:
Two weeks ago, the cost of tickets = $30
Now, the cost of tickets = $39
To find:
The percent increase.
Solution:
We have,
Initial value = $30
New value = $39
Formula for percentage increase is:
[tex]\%\text{increase}=\dfrac{\text{New value - Initial value}}{\text{Initial value}}\times 100[/tex]
Using this formula, we get
[tex]\%\text{increase}=\dfrac{39-30}{30}\times 100[/tex]
[tex]\%\text{increase}=\dfrac{9}{3}\times 10[/tex]
[tex]\%\text{increase}=3\times 10[/tex]
[tex]\%\text{increase}=30[/tex]
Therefore, the percent increase in the cost of tickets is 30%.
Jayna used the distributive property to simplify the expression 4(a + 2) and got(4a + 2). Do you agree with Jayna?
Answer:
No
Step-by-step explanation:
I would not agree with Jayna because using the distributive property, you can get:
4(a + 2) = 4(a) + 4(2) = 4a + 8
Jayna did not get the right answer because she did not distribute the 4 to the 2 in a + 2 and she only multiplied a by 4.
I will give brainiest
Answer:(0, -3)
Step-by-step explanation:
Alejandro wants to rent an apartment that costs $795 a month. They want $25 for a
credit check and one month's rent as a security deposit. How much money does
Alejandro need to rent the apartment.
Answer:
820
Step-by-step explanation:
795 + 25 = 820$
Find g(x)) when f(x) = 3x2 + x - 8, and g(x) = 4x + 5
I have no idea what she’s talking about please help me out
Answer:
A
Step-by-step explanation:
Option A is the correct answer of this question.
What is the value of f(4) if (x)=3x-10
Answer:
f(4) = 2
Step-by-step explanation:
x = 3(4) - 10
x = 12 - 10
x = 2