3+6, I believe. (I have to explain it a little better, so, 9-6=3, which means that 3+6=9)
A researcher's design of an experiment is to make clearer already known
facts, or to discover new knowledge.
The responses are:
- Experimental units: <u>The customers</u>
- Explanatory variable: The <u>type of checkout used</u>
- Treatments: The <u>checkout to which a customer is sent to</u>
- Response variable: The <u>time it takes to check out</u>
Reasons:
The aim of the experiment is to determine if self-check out is faster than
regular checkout.
The number of customers sent to one of the checkout options = 100
The experimental units are the subject of the experimental treatment.
Therefore;
- <u>The experimental units are the customers</u> that are sent to a particular checkout.
An explanatory variable is the manipulated variable in an experiment. An explanatory variable is known as an independent variable.
- In the question, <u>the explanatory variable are the type of checkout</u>; Self-checkout or regular checkout
Treatments are the levels of the explanatory variable available in the experiment, or a combination of the levels. The treatment is what the experimental units are subjected to.
- In the question, <u>the treatment are the use of self-checkout or regular checkout</u>.
The response variable, is also known as the dependent variable, that depends on the treatment an experimental unit is subjected to.
- <u>The response variable in the question is the times it takes to checkout</u>
Learn more about experimental design here:
brainly.com/question/2118275
<em>The </em><em>price</em><em> Manuel </em><em>paid </em><em>for the</em><em> balloons</em><em> is</em><em> $17</em>
<h3>The formula for the relation has been given as </h3>4.5j + 2m
where we are told that m stands for medium and
j stands for jumbo.
Here, all we have to do is to make a direct substitution for the jumbo and medium sizes as given in the question.
- j = 2
- m = 4
Therefore, substituting into the primary equation, we have
4.5(2) + 2(4) =
9 + 8 = 17 dollars
The price Manuel paid to Paula is 17 dollars.
learn more about mathematical equations here brainly.com/question/22688504
Answer:
A. We are given that the length of the box is equal to 24 as indicted in the "24-inch long". From the given, it is also stated that the width of the box is 7 inches less than the height. If the height of the box is x, the width is then x - 7. The equation that would let us solve the problem is,
2880 = 24(x)(x - 7)
Simplifying,
2880 = 24x² - 168x
B. The value of x from the equation is 15. Thus, the answer is YES.
Step-by-step explanation: