Answer:
-1/6
Step-by-step explanation:
-1
6
-1*1= -1
2*3= 6
Elena would like to know the average height of seventh graders in her school district. She measures the heights of everyone in a random sample of 20 students. The mean height of Elena's sample is 58 inches, and the MAD (mean absolute deviation) is 3 inches. Select all the true statements. The mean height of all seventh graders is likely be between 52 and 64 inches. Another random sample of 20 students will always have a mean of 58 inches. A sample of 20 female students would be more likely to get an accurate estimate of the mean height of the population than a sample of a mix of 20 male and female students. m A sample of 100 seventh graders would be more likely to get an accurate estimate of the mean height of the population than a sample of 20 seventh graders. a Elena's sample proves that half of all seventh graders are taller than 58 inches.
Answer:
A. The median height of the sample must be between 59 and 63 inches.
B. Another random sample of 20 students is likely to have a mean between 57 and 65 inches.
E. Elena would be more likely to get an accurate estimate of the mean height of the population by sampling 40 people instead of sampling 20 people.
Step-by-step explanation:
The mean absolute deviation shows the variation in a given data set. It can be determined by calculating the mean of the absolute value of the initial mean and each data set. It describes how spread out the data set are.
With respect to Elena's sampling, the mean absolute deviation is 2. This shows that there is little variation among the data set.
The estimate becomes more accurate if she increase the sample size. Thus options A, B and E are appropriate.
Ramkin is going to flip a fair coin 100 times.
What is the best prediction for the number of times that the coin will land tails up?
Answer:
50 times
Step-by-step explanation:
You are going to flip a coin 100 times. There are 2 sides. So, what you would do is divide 100 by two because there are two sides. There is a 50% chance that the coin will land on heads, and a 50% chance it will land on tails.
Please let me know if you have any more questions. Hope this helps!
A spherical container has a diameter of 100 centimeters. It is filled with a liquid that costs $80 per cubic centimeter. What is the total value of the liquid in the container?
Use 3.14 for π.
Enter your answer in the box to the nearest penny. will mark brainliest
Answer:
The total value of the liquid in the container is about $41,866,666.67.
Step-by-step explanation:
A spherical container has a diameter of 100 centimeters.
It is filled with a liquid that costs $80 per cubic centimeter.
And we want to determine the total value of the liquid in the container.
We can start by finding the volume of the container.
Since the container has a diameter of 100 centimeters, its radius if 50 centimeters.
The volume of a sphere is given by:
[tex]\displaystyle V=\frac{4}{3}\pi r^3[/tex]
Substitute. We will also use 3.14 for π. So:
[tex]\displaystyle =\frac{4}{3}(3.14)(50)^3=523333.33...\text{ cm}^3[/tex]
(Try not to round intermediate values.)
Since each cubic centimeter costs $80, we will multiply the total volume by the cost per cubic centimeter to find the total value. Thus, the total value is:
[tex](523333.\overline{3})(80)\approx \$41, 866, 666.67[/tex]
The total value of the liquid in the container is about $41,866,666.67.
Find m<1
32°
350
Оа
32°
Ob
35°
58°
Od
90°
Answer:
in triangle of 35 degree,
other angle = (35+90)
that is 125.
therefore angles is 180-125= 55 degrees.
for the upper triangle,
same thing.
180-(32+90)=180-122=58 degrees
(please help ASAP) Help me Identify what is wrong in someone else's work
Answer:
His problem is he should have use COS instead of SIN
41.69= x
Step-by-step explanation:
if you are looking for the altitude, then we have and adjacent side and hyp. so COS 52=y/36
.616=y/36
22.164=y
Tan (28)= 22.164/x
.5317x=22.164
x=41.69
PLEASE HELP!!!!
IF DON'T KNOW PLEASE DON"T ANSWER!!!!
Answer:
dawdawdwawdawdda
Step-by-step explanation:
daqwdwadwadwawdadw
Solve the system of linear equations.
3x + 5y = -2
2x - y = 3
Answer:
3x + 5y = -2 is x= −5 /3 y+ −2 /3
2x - y = 3 is x= 1 /2 y+ 3 /2
Step-by-step explanation:
help please, I really need it to move on.
Answer:
D
Step-by-step explanation:
I believe it's d. it looks closest to the values provided.
Helppppp I don’t understand!!!!!!!!!!!!!!!!!!!!!
Answer:
∠RPQ = 53°
Step-by-step explanation:
∠SPR and ∠RPQ are complementary, meaning that they add up to 90°. So,
∠SPR + ∠RPQ = 90°
We know that ∠SPR = 37°, so
37° + ∠RPQ = 90°
∠RPQ = 90° - 37°
∠RPQ = 53°
Simplify using properties of operations and then factor the expressions using the GCF. (2g + 2) - (-4g - 7)
Answer:
3(2g + 3)
Step-by-step explanation:
We start out with the expression (2g + 2) - (-4g - 7).
Firstly, let's distribute the negative:
(2g + 2) - (-4g - 7)
2g + 2 + 4g + 7
Now, combine like terms:
2g + 4g + 7 + 2
6g + 9
The GCF stands for "Greatest Common Factor." In this case, we have to find the GCF between 6 and 9. What is the GCF of 6 and 9? It would be 3. So,
6g + 9
3(2g + 3)
The height of the water in an above ground pool is 36 inches. The pool needs to be drained. As the water drains, the height of the water changes at a rate of -1/2 inch per minute. How many minutes will it take to drain the pool?
Answer:
72 minutes
Step-by-step explanation:
Height of water in pool = 36 inches
Drain rate = - 1/2 inch per minute
The number of minutes it'll take to fully drain :
Height of water / drain rate
= 36 / 1/2
= 36 / 0.5
= 72 minutes
The figures are similar. Find the area of the smaller rectangle. GIVING BRAINLY!!
Answer:
4 in^2
Step-by-step explanation:
The rate is 1:5
26. Pauline's health club has an enrollment fee
of $175 and costs $35 per month. Total cost as a
function of number of membership months
is shown in the graph.
a. Write an equation that represents the total cost
as a function of months.
b. Identify the slope and y-intercept and describe
their meanings.
C. Find the cost of one year of membership.
Cost ($)
250
200
150
100
50
0
HELP i cant really understand how to work it out... its algebra btw.
Answer:
A because you can go into the numbers evenly
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
it is important to note that 40/8 = 5.
A real number is one that can be found on the number line, and 5 can be.
A rational number can be made by dividing two integers (40 by 8 in this case).
5 is a whole number since it does not have a decimal/fractional part
an integer is a whole number which is positive/negative (5 is positive in this case)
If x=5 and y=−2, evaluate the following expression:10+5xy
Answer:
-40
Step-by-step explanation:
You can replace the values of x with 5 and the values of y with (-2).
10 + 5xy = 10 + 5 × 5 × (-2)
= 10 + 5 × (-10)
= 10 + (-50)
= -40
Answer:
-40Step-by-step explanation:
10+5xy
[By putting the value of x = 5 and y = -2 ]
= 10 + 5 × 5 × (-2)
= 10 - 50
= -40 (Ans)
Need help fast!!
What is value of x?
Enter your answer in the box.
Answer:
x = 27
Step-by-step explanation:
Using ratio:
[tex] \frac{10}{14} = \frac{x + 8}{2x - 5 } \\ 10(2x - 5) = 14(x + 8) \\ 20x - 50 = 14x + 112 \\ 20x - 14x = 112 + 50 \\ 6x = 162 \\ \frac{6x}{6} = \frac{162}{6} = > x = 27.[/tex]
Solving each equation: -10-3(x-2)=-(4+3x)
Answer:
-4-3x = -4-3x
Step-by-step explanation:
-10-3(x-2)=-(4+3x)
-10-3x+6 = -4-3x
-4-3x = -4-3x
Assume the data below is exponential Determine the growth/decay factor. Estimate your answer to 3 places after the decimal.
15
16
У
90
74
Х
9514 1404 393
Answer:
37/45 ≈ 0.822
Step-by-step explanation:
The formula for an exponential relation is ...
y = a·b^x
This question is asking for the value of b. It can be found by substituting the given values of x and y, and taking the ratio of the resulting equations.
90 = a·b^15
74 = a·b^16
Dividing the second equation by the first, we have ...
74/90 = (a·b^16)/(a·b^15)
74/90 = b
The decay factor is 74/90 = 37/45 ≈ 0.822
Answer:
37/45=0.822 this is my answer
As an estimation we are told 5 miles is 8 km.
Convert 33.7 miles to km.
Answer:
The answer is 54.23489
Step-by-step explanation:
Hope this helps
Select the correct answer.
What is the domain of the function shown on the graph?
Answer:
B. negative infinity < x < positive infinity
Step-by-step explanation:
When a question asks for the domain of a function, it is asking for all possible x-values, so we can rule out choice A since there are clearly x-values greater than 1. This graph shows arrows pointing left and downward, indicating that the graph continues past what we can see. This tells us that even though the x-values look like they end at -10 and 2, they continue further, so we can also rule out option C and option D. After these eliminations, we are left with choice B, which is a way of writing "All real numbers," and is the domain for all exponential functions, including this one.
lmk if im incorrect about anything, hope this helps :)
Find the base of a rectangle with a height of 5.3 meters and an area of 2.12 square
meters
Answer:
i think 7.42 i think
Step-by-step explanation:
HELP ME OMG BEFORE I K.MS
If a line containing these points is plotted on a coordinate plane what should the graph look like (brainliest)
Answer: OPTION 3 i think sorry
and please dont kus
Step-by-step explanation:
Original price of an apple watch: $299.00 Sales Tax: 7%
20.93 is 7% of that
Rectangle ABCDABCDA, B, C, D is graphed in the coordinate plane. The following are the vertices of the rectangle: A(3, -2)A(3,−2)A, left parenthesis, 3, comma, minus, 2, right parenthesis, B(6, -2)B(6,−2)B, left parenthesis, 6, comma, minus, 2, right parenthesis, C(6, 5)C(6,5)C, left parenthesis, 6, comma, 5, right parenthesis, and D(3, 5)D(3,5)D, left parenthesis, 3, comma, 5, right parenthesis.
What is the area of rectangle ABCDABCDA, B, C, D?
Answer: 21 units
Step-by-step explanation:
how many times can 10 go into 111?
Answer:
11 times
Step-by-step explanation:
hope this helps
Answer:
11.
Step-by-step explanation:
10 x 10 = 100
10 x 11 = 110
10 x 12 = 120 which is too much so its the one above.
Can someone help me please
Answer:
13.7
Step-by-step explanation:
15^2-6^2=189
The square root of 189 is 13.74 blah blah blah
Answer:
13.7
Step-by-step explanation:
a²+b²=c²
a²+6²=15²
a²+36=225
a²=189
a≈13.7
Solve by factoring 2x^2-7x-4=0
Which of the numbers below is greater than zero? Select all that apply.
-2.5
-1/5
3.5
4/5
2.25
Answer fast i will give brainless!
Answer:
3.5, 4/5 and 2.25 is greater than zero
Step-by-step explanation:
Basicly any number without a - sign is greater than zero. Hope this helps :)
Answer:
3.5 and 2.25
Step-by-step explanation:
-2.5 is a negative so cross that out, same thing goes for -1/5. 4/5 is a fraction so its less than zero but if it was 5/5 that would equal 1 but its not
(5y+5)+(7y-9)=(6x+50)+2(5x-5)
HELP PLZ ASAP PLZ HELP ME ITS DUE IN LIKE 7 MIN HELP ME
Answer:
ok the perimeter is 10 and the area 6
Step-by-step explanation: