Problem 10:
Step One: Write the expression
When a problem says some number (in this case 17) more than a variable it almost always refers to addition. So we know that the expression's operation is addition. We are adding 17 to our variable, n. It should look like this:
n + 17
Step Two: Replace n with a Number
Pick your favorite number and replace n with that number. For simplicity's sake, I will choose the number 2. So n + 17 becomes:
17 + 2
Notice how n has been replaced with our number. Remember n could be any number, but I chose 2.
Step Three: Simplify the expression.
17 + 2 becomes 19
Problem 11:
Step One: Write the Expression
The first part of our expression is: g =
G represents the total cost of Paresh's day at the bowling alley, including all 5 games and shoe rental.
We know that to rent shoes, it cost Paresh 4 dollars. That becomes the second part of our expression. So now we have:
g = + 4
We also know that he played 5 games of bowling, but we don't know how much Paresh paid per game. So to represent the cost of each individual game, we will use the variable x. He played 5 games, so the third and final part of our expression is 5x. So our final result is:
g = 5x + 4
Answer:
A statistic is said to be unbiased if the mean of its sampling distribution is equal to the true value of the parameter being estimated.
Step-by-step explanation:
A parameter is a number that describes the population.
A statistic is a number that describes a sample.
A statistic used to estimate a parameter is unbiased if the mean of its sampling distribution is exactly equal to the true value of the parameter being estimated. For example, the mean of a sample is an unbiased estimate of the mean of the population from which the sample was drawn.
A statistic is biased if its expected value is not equal to the parameter.
1. The results are nowhere near to being statistically significant.
2. The results are almost but not quite statistically significant.
3. The results are just barely statistically significant.
4. The results are strongly statistically significant.
A group of 10 people is choosing a chairperson and vice-chairperson. They put all 10 people's names into a hat. The first name drawn becomes chair. The second name drawn becomes vice-chair. How many possible combinations of chair and vice-chair are there?
1. 19
2. 90
3. 100
4. 10! (10 factorial)
Answer:
The other angle is 60°
Their ratio is 1 : 2
Step-by-step explanation:
Let us revise some special angles
A pair of complementary angles is two angles their sum is 90°
A pair of supplementary angles is two angles their sum is 180°
In the question
∵ One angle of the pair of complementary angle = 30°
∵ The sum of the two complementary angles = 90°
→ Subtract 30° from 90° to find the other angle
∴ The other angle = 90° - 30° = 60°
∴ The other angle is 60°
To find the ratio of them put them in the form of the ratio, then simplify the ratio to its simplest form
∵ Their ratio = 30 : 60
→ Divide both sides by 10
∴ Their ratio = 3 : 6
→ Divide both sides by 3
∴ Their ratio = 1 : 2
∴ Their ratio is 1 : 2
Answer:
1) 7
2) 11
3)9
Step-by-step explanation:
i dont feel like explaining
