Answer: Formula= x^2 - 2x - 8
Roots=(-2 , 0) (4 , 0)
Step-by-step explanation:
1.) find the equation (the formula is Ax^2 + Bx + C, so plug it in)
2.)Plug it into your calculator's Y= X^2 - 2X - 8 (if you have one)
3.)Press 2nd, Calc, 2
4.)Go to the X Intersect , it will say Left Bound at the bottom left corner
5.)Press the left arrow about 3 or 4 times, hit enter
6.) It will now say Right Bound in the same corner go back to the X intersect, now press the right arrow 3 or 4 times
Repeat steps 3 to 6 for the other X intersect.
Answer:
For any conclusion to be made on the population based on a sample survey, the sample must be representative of the population. Sample represents the population if the following condition is fulfilled:-
The sample is a Simple Random Sample (SRS). A SRS is chosen in such a way that all possible samples of size n are equally likely. This implies that the sample is not biased.
Getting the representative sample is the challenge. The flaws / conditions ignored by the researchers in this case can be:-
Are only male students surveyed? In that case, the female population is ignored.
Are the students surveyed are from a particular region only? Say students surveyed are from "Alaska" where it is cold in most part of the year and people tend to use less sunscreen.
Are students surveyed are from a particular age group only? Say student surveyed are only from Grade 6. Then the sample does not represent students from other grades.
There are chances that the survey was done at the convenience of the surveyor who approached only those students who were approachable - those playing outside the school. This is called convenience sampling. Though the individuals contacted are easy to contact, they may not be representative of the population.
Step-by-step explanation:
Answer: x < -5 1/2 or x < -11/2
Step-by-step explanation:
2 ( 4x + 1 ) < 3 ( 2x - 3 )
8x + 2 < 6x - 9
8x - 6x < -9 -2
2x < -11
x < -11/2
x < -5 1/2
Answer:
17.5
Step-by-step explanation:
17×4=68; half of 4 is 2; 68+2=70
Since 58 for vanilla and 28 for chocolate
The ratio would be 28:58
You can simplify it even further
to 14:29
