Answers
x=4 y=1
Step-by-step explanation:
Related Questions
100 point question. I attached a screenshot of the problem.
Answers
Answer:
9
Step-by-step explanation:
The value of r2 for a relationship between gallons of gasoline used (explanatory) and the number of miles anven
(response) by a certain car is calculated as 96.78%.
Which of the following statements is the best interpretation of r2?
O About 3.22% of the variation in the gallons of gasoline of the car is accounted for by the linear relationship
created with the number of miles driven.
About 3.22% of the variation in the number of miles driven by the car is accounted for by the linear relationship
created with the gallons of gasoline.
O About 96.78% of the variation in the gallons of gasoline of the car is accounted for by the linear relationship
created with the number of miles driven.
About 96.78% of the variation in the number of miles driven by the car is accounted for by the linear relationship
created with the gallons of gasoline.
Answers
Answer:
About 96.78% of the variation in the gallons of gasoline of the car is accounted for by the linear relationship created with the number of miles driven. C
Step-by-step explanation:
An ecological group suspects tuna are consuming dangerous levels of copper in a region of the world. Dangerous levels of copper are classified when they reach beyond 5.7 parts per million. A random sample of 21 tunas in the region were tested and the data is shown in the stemplot.
Part A: What proportion of the tuna in the sample have dangerous levels of copper in their systems? (4 points)
Part B: Construct and interpret a 98% confidence interval for the mean copper levels of the tuna if the sample of 21 tuna has a mean copper level of 4.77 parts per million and standard deviation of 1.16 parts per million. (6 points)
Answers
Answer:
a. 5 out of 21
b. (4.1811, 5.3589)
Step-by-step explanation:
a. We can see from the stem plot that 5 out of the 21 tunas have dangerous levels of copper in their system because the copper level reached over 5.7, and the problem states "Dangerous levels of copper are classified when they reach beyond 5.7 parts per million"
b. How to find it on calculator
Step 1: [stat]
Step 2: go to [tests]
Step 3: go down to [7: zinterval]
Step 4: make sure input is on [stats]
Step 5: input the following
: 1.16
X (with the line above it): 4.77
n: 21
c-level: .98
The solution is :
A.) The required proportion is 5/21=0.2381
B.) 98% confidence the true copper level (in parts per million) lies in the interval (4.13, 5.41).
What is standard deviation?A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.
here, we have,
A) From the stem-leaf plot, we see that out of 21 tunas, 5 have dangerous levels of copper since the levels go beyond 5.7 parts per million. The required proportion is 5/21=0.2381
B) Given the sample mean is {x}=4.77, sample standard deviation s=1.16 and the sample size is n=21.
Since the population standard deviation is not known, we use t-distribution.
So the 98% CI for mean is
4.77 ± t{1-0.02 /2,20} x 1.16/sqrt(21) = (4.13, 5.41)}
We are sure with 98% confidence the true copper level (in parts per million) lies in the interval (4.13, 5.41)
Learn more about standard deviation here:
brainly.com/question/23907081
#SPJ3
Mr. Kershner is a school nurse. He uses, on average, 24 self-adhesive bandages during each spring month: March, April, and May. He also knows that in June there are several field days and he will need 4 times the number of bandages for that month.
If the bandages cost 3 cents each, what is his total cost for March through June?
Answers
If the bandages cost 3 cents each, Mr. Kershner's total cost for bandages from March through June is $5.04.
What is an arithmetic operation?
Arithmetic operations is a branch of mathematics, that involves the study of numbers, the operation of numbers that are useful in all the other branches of mathematics. It basically comprises operations such as Addition, Subtraction, Multiplication, and Division.
The number of bandages used by Mr. Kershner in March, April, and May is 24 bandages each month, for a total of 24 x 3 = 72 bandages for those three months.
In June, he will need four times as many bandages as in the other months, for a total of 4 x 24 = 96 bandages.
The total number of bandages used from March through June is 72 + 96 = 168 bandages.
The cost of each bandage is 3 cents, so the total cost for 168 bandages is 168 x 3 = 504 cents, or $5.04.
Therefore, Mr. Kershner's total cost for bandages from March through June is $5.04.
To learn more about the arithmetic operation visit,
brainly.com/question/13181427
#SPJ1
Find the degree of the term.
- 3x^3
The degree of – 3x^3 is
Answers
Answer:
the degree of -3x^3 is 3
Step-by-step explanation:
the exponent is 3
Kevin can travel 22 1/2 miles in 1/3 hours. What is his average speed in miles per hour
Answers
Answer:
67 1/2
Step-by-step explanation:
22 1/2*3
Write 6.789 in word from
Answers
Answer:
six- and seven hundred eighty nine hundredths
Step-by-step explanation:
6 is the whole number
789 is ow many hundreths there is
It takes a C or better in this class to transfer to another college. What is the ratio of the number of students who can transfer this course in relation to those that cannot
Grades | Number of Students
A 19
B 30
C 25
D 12
F 14
Answers
74/26 simplified to 37/13
<A and <B are vertical
angles. if m<A =(3x+13)° and <B=(5x+9)° then find the measure of <A
Answers
Answer:
Step-by-step explanation:
3x+13 = 5x+9
2x = 4
x = 2
A = 3x+13 = 19°
Gordon read 18 pages of a book about rockets in 40 minutes. What was the unit rate per minute? Per hour?
Answers
Answer:
he can read a page in about 2 minutes and i.d.k about the hour part
Step-by-step explanation:
you do
40 divided by 18 and get 2.2
Answer:
.45 per minute and 27 per hour
Step-by-step explanation:18/40 simplified
What is the quotient of 9.75÷1.3
Answers
Answer:
7.5
You know, you can just use a calculator.
Ron walked 8/10 mile from his grandmothers house to the store. Then he walked 9/10 mile to his house. Use benchmarks to estimate how far he walked altogether.
Answers
Answer:
1 7/10 miles
Step-by-step explanation:
What shape is this cross-section?
A. Rectangle
B. Pyramid
O C. Trapezoid
D. Triangle
Answers
If you're referring to the actual 3D shape, that would be a rectangle. If you're referring to the shape in the middle, it would be a Trapezoid.
Answer:
A. Rectangle
Step-by-step explanation:
It is a rectangle, not any of the other shapes listed in the other answer choices.
Hope this helps! :)
Five lemons cost 1.50 how much does 1 lemon cost
Answers
1 2 3 4 5
PS
The diagram shows the dimensions of a coal bunker.
The volume of the bunker is 0.432 m^3
Calculate the length, a, shown on the diagram. Give your answer in centimetres.
Answers
Answer:
Step-by-step explanation:
80×= 8×+16
Which expression is equivalent to
Answers
Answer:
C
Step-by-step explanation:
16 times 0.5x equals 8x.
16 times -0.75 equals -12y, so this means A and D are incorrect.
16 times 2 is 32, so this means that B is wrong, for you must multiply each number in the parentheses by 16.
Hope that helps :)
Help&EXPLAIN
Don’t use for points or I’ll take it back and report
Answers
Answer: 6
Step-by-step explanation:
Answer:
x = 105 degrees
Step-by-step explanation:
180 degrees total
180 - 75 = 105
x = 105 degrees
3 +3/2 x + 4 = 4x -
5/2X
Answers
If this helped mark me brainliest please!!
How might a victory at Gettysburg have benefited the confederacy? Plz I need this fast!!!! I will mark brainist!!!
Answers
Answer:
It might have convinced European nations to align with the South.
Step-by-step explanation:
i did this one twice
what is the y-intercept of the line perpendicular to the line y = 4/3 x + 1 that includes the point (4, 1)
Answers
Use ΔDEF, shown below, to answer the question that follows:
What is the value of x rounded to the nearest hundredth? Type the numeric answer only in the box below.
Answers
Consider the baggage check-in process of a small airline. Check-in data indicate that from 8 a.m. to 9:30 a.m., 360 passengers checked in. Moreover, based on counting the number of passengers waiting in line, airport management found that the average number of passengers waiting for check-in was 30.
Required:
How long did the average passenger have to wait in line?
Answers
Answer:
[tex]Average = 7.5\ mins[/tex]
Step-by-step explanation:
Given
[tex]Time = 90\ mins[/tex] i.e. 8am to 9:30am
[tex]Total\ Passengers = 360[/tex]
[tex]Average\ Passengers= 30[/tex]
Required
Determine the average waiting time
The average waiting time is calculated as:
[tex]Average = \frac{Average \ Passengers}{Total\ Passengers} * Time[/tex]
[tex]Average = \frac{30}{360} * 90\ mins[/tex]
[tex]Average = \frac{30* 90\ mins}{360}[/tex]
[tex]Average = \frac{2700\ mins}{360}[/tex]
[tex]Average = 7.5\ mins[/tex]
Hence, the average waiting time is 7.5 minutes
Linda started taking piano lessons. She had to practice 1 3/4 hours each day. If after only 8 days Linda decided she wanted to stop, how many hours did she take lessons
Answers
Answer:
If you mean how many hours did she practice because it didn't say how long her lessons are then the answer is 14 hours
Step-by-step explanation:
1 3/4 = 1.75
8 times 1.75 = 14
HELP PLEASEEEEEEEEEEEEEEEEEEEEEEE WILL GIVE BRAINLISTTTTTTTTTTTTTTTTTTT
Answers
Answer:
Step-by-step explanation:
if we need to approximate,
the radius=125, the diameter is d=250
we estimate that pi=3
C=3*250=aprox 750
the closest number is 785
Answer:
I think it's D 785 meters.
Step-by-step explanation:
Circumference is 2nr
C=2πr=2·π·125≈785.39816
785.39816 is rounded to is 785
WILL GIVE BRAINIEST TO THE FIRST PERSON WHO ANSWERS THEM ALL CORRECTLY, BUT U HAVE TO BE QUICK!!!
Answers
Answer:
A) a^8
B) 16a^14
C)a^mn
D)24a^yz
E)a^3
F)5a^2
G) a^5
H)a^m-n
Tyler poured 15 cups of water into 2 equal sized bottles and filled each bottle. How much water was in each bottle?
Answers
Answer:7.5
Step-by-step explanation:
you divided 15 into 2
Answer:
7 and a half
Step-by-step explanation:
Divide 2 and 15 toet 7 and a alf
If the diagonals of a shombus are 10 and 24, find the area of the rhombus
A
120 units
B
240 units
С
60 units
D
180 units
Answers
how do i do math qyestions
Answers
Answer:
By solving them of course ;-;
Answer: that depends on the qyestion
-4(2x-7)=12 give the value of x. Enter your value for x and your explanation or steps used to solve for x
Answers
Answer:
2
Step-by-step explanation:
-4(2x-7)=12
(2x-7)=12/(-4)
2x-7=-3
2x= -3+7
2x= 4
x= 4/2
x=2
If Izzy has 43 minutes to do her work and her brother has 30 because he started before her how many minutes they would have together do you have to multiply to find it out
Answers
Answer:
you dont have to multiply
Step-by-step explanation:
because the keyword "Have together" in math indicates it is an adding problem