Answer:
25/12
Step-by-step explanation:
So first change the mixed numbers into improper fractions. 5/4 ad 5/3. Then just multiply them. 25/12.
Range is the y values or the height
so we see its highest point is y=4
it's lowest is y=-1
so range is from 4 to -1
hmm, not listed
maybe we should assume that the ggraph keeps going down and right
so it goes from 4 to negative inifnty
so that is the 2nd option
Ignore above
your equation is 2(cosx)^2-3cosx+1=0
use quadratic formula to get results
you will end up with
cosx=1 or cosx=1/2
so, x=0 or x=pi/3
Answer:
The variance is 
Step-by-step explanation:
From the question we are told that
The sample size is n = 21
The sum of squares is 
Generally the variance is mathematically represented as

substituting values

