Answer:
-1/2
Step-by-step explanation:
cos(x+pi) = -cos(x), so the answer is -1/2.
1. your leading coefficient has to be 1 (nothing before the x^2). If there is you have to divide that out before you start.
2. Move your constant (the number without any x attached) to the other side of the equation
3. take 1/2 of the b term (the one with the x attached) and then square it and then add it to both sides
4. Factor the left side
5. Set each factor equal to 0 and solve
Here is an example:
4x^2-24x+20=0
The first term is not a 1 so we have to divide it out by 4 first
x^2-6x+5=0
Move the 5 to the other side. It becomes negative.
x^2-6x=-5
Take 1/2 of 6 (3) then square it (9) and add it to both sides.
x^2-6x+9=-5+9
Factor the left side
(x-3)(x-3)=4
(x-3)^2=4
To solve you need to square root both sides
x-3=+/-
x-3=+/-2
x=3+2=5
x=3-2=1
Those would be your two answers.
<span>Hope that helps</span>
Answer:
C
Step-by-step explanation:
The Central Limit Theorem (CLT) implies that the distribution of the mean is approximately normal for large n. I.e. the distribution of the population means will be approximately normally distributed, and provided there is a large sample of the population.
Answer:
How to Make a Stem-and-Leaf Plot
Step 1: Determine the smallest and largest number in the data. The game stats: ...
Step 2: Identify the stems. For any number, the digit to the left of the right-most digit is a stem. ...
Step 3: Draw a vertical line and list the stem numbers to the left of the line.
Step 4: Fill in the leaves. ...
Step 5: Sort the leaf data.
Step-by-step explanation:
