To solve a quadratic equation in the form you can use the quadratic formula:
In your case, the equation is identified by the coefficient choice , so the solving formula becomes
As you can see, we have a negative number under a square root, an operation impossible to perform using real numbers. So, this equation has no real solutions.
40.8 cm
B.
132.7 cm
C.
81.6 cm
D.
20.4 cm
Answer:
Step-by-step explanation:
On seeing the graph we find that x intercepts are 1 and 5.
Also y intercept is 5
Vertex is at (3,-4) and also parabola is open up.
The possible equations can be of the form
y =a(x-1)(x-5)
y =a(x^2-6x+5)
When x=0, y =6
Hence 6 =5a
a =6/5
Solution is
statistical analyses. The researcher administers a survey to 15 students who
are seated at the front of the laboratory. How could this study be improved?
Select all that apply.
A. Use an instrument to test statistical analysis understanding.
B. Select a random sample of students who go to the work
laboratory
c. Use a larger sample size.
D. Administer instruments to a group who does not go to the work
laboratory, as well.
Answer:
B. Select a random sample of students who go to the work laboratory
Step-by-step explanation:
The best way to get acurate results is by selecting a random sample of students. If the students administers a survey to the students that are seated at the front of the laboratory he could get biased results.
The students that are seated in fron of the laboratory could obey to a certain characteristic (ie. They could be very applied students), which could definitely provide us with a different result.
The survey is just fine. We don't need any instrument to test statistical analysis understanding. Also, using a larger sample size of students seated in front of the laboratory won't make much difference. Finally, Administering instruments to a group who does not go to the work laboratory makes no sense. You can not measure effectiveness on people that don't assist to class.
Answer:
Select a random sample of students who go to the work laboratory
verified on a p e x