Part A) Start at 0 on the number line. Count out 7 spaces (each space is 0.25 units wide) so you'll end up at 1.75 which is the total cost. The 7 spaces refer to the number of postcards purchased.
Part B) Multiply 0.25 by 7 and you should get 1.75; alternatively, you can multiply 25 by 7 to get 175, then move the decimal point 2 spots to the left to get 175 ---> 1.75
Answer:
x = 13.5
Step-by-step explanation:
To get the mean or average.
You divide 725 from 5.
725/5 = 145
Her average is $145 per day.
Hope this. helps!
Answer:
The null hypothesis is that all the different teaching methods have the same average test scores.
H0: μ1 = μ2 = μ3 = μ4 = μ5
The alternative hypothesis is that at least one of the teaching methods have a different mean.
Ha: at least one mean is different. (μ1 ≠ μi)
Step-by-step explanation:
The null hypothesis (H0) tries to show that no significant variation exists between variables or that a single variable is no different than its mean. While an alternative Hypothesis (Ha) attempt to prove that a new theory is true rather than the old one. That a variable is significantly different from the mean.
For the case above, let μ represent the average test scores for the teaching methods:
The null hypothesis is that all the different teaching methods have the same average test scores.
H0: μ1 = μ2 = μ3 = μ4 = μ5
The alternative hypothesis is that at least one of the teaching methods have a different mean.
Ha: at least one mean is different. (μ1 ≠ μi)
A total of 1,716 selections of the 7 flowers are possible.
Step-by-step explanation:
Step 1:
There are 13 flowers from which Jeanine Baker plans to use 7 of them.
To determine the number of selections that are possible we use combinations.
The formula for combinations is; 
.
Step 2:
In the given formula, n is the total number of options and r is the number of options to be selected.
For this question, 
and 
.
So 
So a total of 1,716 selections are possible.
