I believe the answer is 9.5
you should know: in all means in total, so simply you add everything up.
answer:
1 + 2/4 + 3/4
- convert 1 to a fraction so its easier to add.
1 = 4/4 (must have the same denominator to add)
4/4 + 2/4 + 3/4
- add the numerators (top), NOT the denominators (bottom)
you get: 9/4 (this is an improper fraction, so you convert this into a mixed number)
9/4 = 2 1/4
FINAL ANSWER: (its a mixed number)
2 1/4
<em>-- let me know if you have any questions regarding this. </em>
Answer:
x = 6 cm
Step-by-step explanation:
The area is the product of length (x +2) and width (2x -5). It is 56 cm², so for all dimensions in cm, we can write ...
(x +2)(2x -5) = 56
2x² -x -66 = 0 . . . . . subtract 56 to put into standard form
(x -6)(2x +11) = 0 . . . . factor
Solutions to the equation are values of x that make the factors zero:
x = 6, x = -11/2
The negative solution is extraneous, so the solution of interest is ...
x = 6 cm
You can't simply consider the mean of the three means, because each mean is achieved by a different number of students.
Consider an extreme example, just to understand the concept: if 1 students gets a grade of 100 and one million students get a grade of 0, we can't say that the combined mean is 50!
What we need to do is called a weighted average, i.e. an average where we consider the weight of every entry - in this case the weight is given by how many students achieved a certain grade.
So, if each value comes with a weight , the weighted average is computed as
Applying this formula to your case, we have
Answer:
Step-by-step explanation:
The similar things between the two is that they both to through the y-intercept and x-intercept, but one graph is positive and the other is negative and also have different slopes.