Answer:
Step-by-step explanation:
hello :
3b^4−6b^2+27b = 3b(b^3-2b+9)
Answer:
30.5
Step-by-step explanation:
Answer:
im just in 6 grade
Step-by-step explanation:
Answer:
Step-by-step explanation:
The diagram shows lines passing through the points of two equations.
We will determine the points through which the lines pass through on the graphs.
Looking at the line on the right hand side of the graph, the slope is
(y2-y1)/x(2-x1) where
y2= 0, y1 = 4
x2 = 3, x1=0
Slope, m = (0-4)/3-0
Slope = -4/3
Recall the equation of a straight line is y = mx + c
Where c is the intercept.
So the equation is y
y = -4x/3 + 4
Looking at the line on the left hand side of the graph, the slope is
(y2-y1)/x(2-x1) where
y2= 0, y1 = 2
x2 = -1, x1 =0
Slope, m = (0-2)/-1-0
Slope = -2/-1 = 2
Applying equation of a straight line is y = mx + c
The equation
y = 2x + 2
So the equations are
-4x/3 + 4. If x lesser than or equal 0
2x + 2. If x greater than 0
Solution
Question 1:
- The formula for finding the mean score is that of the expected value formula. That is,
- Thus, the mean can be gotten as follows:
The mean score is 7.43
Question 2:
- The more students write the exam, the more the mean score will approach the theoretical mean score.
- The theoretical mean score is calculated above to be 7.43
- Thus, as more students write the quiz, their scores approach 7.43
