Answer:
x= -1.24, 3.24
Step-by-step explanation:
x² – 2x=4
Bring 4 over
x² – 2x - 4=0
Quadratic formula:
if ax²+bx+c=0
the (+-) = ±
= 3.24
= -1.24
Variance is the standard deviation squared but we're not going to use that now. Let's first calculate the mean:
mean = (17+13+13+22+11+20)/6 = 16.
Now for each value, let's see how far it is from this mean. We'll square these distances and average them. That's our variance.
17 distance 1 squared = 1
13 distance 3 squared = 9
13 distance 3 squared = 9
22 distance 6 squared = 36
11 distance 5 squared = 25
20 distance 4 squared = 16
Now average these outcomes:
variance = (1+9+9+36+25+16)/6 = 16.
So the variance by coincidence is the same as the mean.
Answer C is your answer.
Answer:
Step-by-step explanation:
A dollar is 100 cents
3/8 = .375
0.375 * 100 = 37.5
Rounded it is 38 cents.
So far, there is no units we can see becaus we have no context what this is trying to find
so
use the distributive property which goes like this: a(b+c)=ab+ac
so
first distribute
6(60-r)=6(60)+6(-r)=360-6r
now we have
15r+360-6r=
15r-6r+360=
9r+360
there are no units associated with the expression
Answer:
C
Step-by-step explanation:
To find the x- intercept let y = 0, hence
cos() = 0
= (0 ) =
multiply both sides by 2
x = π ← x- intercept