So, in order to find the answer, this is what we are going to do.
Let K be the number of candies that Kahi can eat per hour and S be the number of candies that her sisters can eat per hour.
So for the sisters, let us divide 32 by 3 and we get, 10.67. so 10.67/ hour.
Now, consider this expression: <span>(K+S)*h = 32
Plug in the given values.
(32 +10.67)h = 32
42.67h = 32
Divide both sides by 42.67 and we get
h= 1.33. Therefore, it will take 1.33 hour for both of them together to eat 32 candies. Hope this answer helps.</span>
Answer:
The correct option is <u><em>option a. an extra variable that could explain result differences between groups.</em></u>
Step-by-step explanation:
Confusion variables, also called third variables, are variables that the investigator did not control or did not eliminate and that damage the internal validity of an experiment, that is, the degree to which the results are valid.
The dependent and independent variables are the two main variables of any experiment or investigation. The independent is one that changes or is controlled to study its effects on the dependent variable. The dependent is that variable that is investigated and measured.
Confusion variables may cause the investigator to analyze the results incorrectly. The results may show a false correlation between dependent and independent variables.
So <u><em>the correct option is option a. an extra variable that could explain result differences between groups.</em></u>
This is because this additional variable that was not controlled or taken into account during the experimental study modifies the result. And the other groups that conducted the experiment and took into account the variable will have different results because they take into account other independent variables.
Step 1
Given; There are 5 tons of gravel divided equally by four dump trucks
Required; To find how much gravel is in one dump truck.
Step 2
Find how much gravel is in one dump truck.
Hence, each dump truck 1.25 tons of gravel
Answer: $8 flat rate
Step-by-step explanation: First subtract 24.50 from 48.50 to find the amount that was charged for the 3 additional books.
48.50 - 24.50 = 24
So the remaining 3 books costed a total of $24
Next, we need to divide 24 by 3 to determine how much each additional book costs.
24/3 = 8
So, the flat rate after the first book is purchased is $8 per additional book.