A study was conducted to estimate the mean amount spent on Christmas gifts for a typical family having two children. A sample of size of 101 was taken and the mean amount spent was $225 with astandard deviation equal to $50. Find a 95% confidence interval for the mean for all such families. Round to the nearest whole dollar.
The confidence interval is from
(Do not enter dollar signs.)
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Answer:
I just think it out in my head
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A car has 4 wheels There are 21 cars. How many wheels are there?A.48 B.64 C.84 D.74
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PLEASE HELP?Find the indicated probability. Express your answer as a simplified fraction unless otherwise noted.The table below shows the soft drinks preferences of people in three age groups.If one of the 255 subjects is randomly selected, find the probability that the person is over 40 years of age.
Answers
Explanation:
Add all the boxes:
There are 16 (x^2) boxes;
There are 8 (x) boxes;
And the constants = 1
So it becomes:
And the product is (4x+1)(4x+1)
4x(4x+1) + 1(4x+1)
16x^2 + 4x + 4x + 1
Answers
Answer:
There's no questions or worksheet attached.
Final answer:
This question pertains to linear equations, a topic in high school level algebra. Linear equations produce a straight line when graphed and can be solved using algebraic methods. Completing the homework might involve solving for variables, graphing the equations, or interpreting the graphs.
Explanation:
The subject of this question is about Unit 4 Linear Equations Homework 12 which falls within the scope of Mathematics, specifically in the field of algebra. A linear equation is an equation between two variables that produces a straight line when graphed out. Solving such equations involves procedures such as simplification, addition, subtraction, multiplication and division.
As for homework, it might involve solving for variables, graphing the linear equations, or interpreting such graph. For example, the equation of a line could be form such as 'y=mx+b', where 'm' is the slope of the line and 'b' is the y-intercept. One might be asked to determine the slope and y-intercept from a given equation or to write an equation given certain information.
When tackling this kind of homework, one should carefully review his/her class materials and notes. Once the concept and the procedure is clear, practice with some example problems is a great way to increase confidence and proficiency in solving linear equations.
Learn more about Linear Equations here:
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Answer:
One input(x-value) can only have one output(y-value) in order to be a function.
Step-by-step explanation:
Final answer:
One-to-one functions yield unique outputs for each input. Many-to-one functions can yield the same output for different inputs. The term one-to-many does not typically apply to functions, and a relation is not a function if one input yields multiple outputs. To answer the question specifically about Item 2, additional information or a visual representation is needed.
Explanation:
To determine the type of a function or relation, we need to understand what it means for a function to be one-to-one, many-to-one, one-to-many, or not a function.
A function is one-to-one (also known as injective) if every element of the range corresponds with exactly one element of the domain. In simpler terms, no two different inputs (x-values) yield the same output (y-values).
A function is many-to-one if there are at least two elements in the domain associated with the same value in the range. This means, two or more different inputs (x-values) can yield the same output (y-value).
The term one-to-many typically does not apply to functions in the strictest mathematical sense. Functions by definition associate one, and only one output with each input.
Lastly, a relation is not a function if at least one element in the domain is associated with more than one value in the range. That is, there is atleast one input (x-value) that yields more than one output (y-value).
Without further specific information or visual representation (like a graph) of Item 2, it's difficult to definitively state what type of relation or function it is.
Learn more about Types of Functions here:
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Answer:
32 miles
Step-by-step explanation:
32 miles is equal to 51.499008 Kilometers
12.7 kilometers is equal to 7.891414 miles
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Answer:
the answer is 25 degrees
Answer:
alpha = 25°
Step-by-step explanation:
The picture indicates a rectangle.
Alpha is in a straight corner of 90 °, so...
65 + alpha = 90
subtract 65 left and right of the = sign.
65 - 65 + alpha = 90 - 65
0 + alpha = 90 - 65
alpha = 25°
B.4
C.1/4
D.1/2
ANSWER QUICKKK
Answers
Answer:
The answer is D.
Step-by-step explanation:
ItisgiventhatGabriellaswims2lapsfor1minute.Soinordertofindhowmanyminutesdidheswimforeachlap,youhavetodivideitby2:
2 laps = 1 minute
2 laps ÷ 2 = 1 minute ÷ 2
1 lap = 1/2 minute
= 30 seconds
Test:
Gabriella swim 1/2 min per lap. So if he swim 2 laps, you have to multiply it by 2 :
1/2 × 2 = 1 minute
Answer:
The answer is D
Step-by-step explanation:
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