Unfortunately, you are wrong. 2x + 3y
x = 4 y = -6
2(4) + 3(-6)
8 + -18
Answer is -10.
If you found this helpful, please brainliest me!
Answer:
See below ~
Step-by-step explanation:
The given polynomial : <u>-2x + 1 + 2x²</u> needs to be written in the form :
- ax² + bx+c
- a is the coefficient of x²
- b is the coefficient of x
- c is the constant term
On rewriting in this asked format,
- 2x² - 2x + 1
- a = 2
- b = -2
- c = 1
A) Let x = first score and y = second score
E[x] = 20.9 and E[y] = 20.9
E[x-y] = E[x] – E[y] = 20.9 – 20.9 = 0
b) Standard deviation
= Var[x-y] = Var[x] + Var [y]
= 4.8^2 + 4.8^2 = 46.08
SD[x-y] = sqrt(Var[x-y])
= sqrt(46.08)
= 6.8
c) Z = +/- (mean-x)/SD = +- (0-6)/6.8 = +/- 0.88
From Z table: P(Z<-0.88 or Z>0.88)
= 2*P(Z>0.88)
= 2*0.1894
= 0.3788
x=-26 is the final anwser :)
We can use a factorial to solve this:
3! = 3 * 2 * 1 = 6
So, she can wear them in a total of 6 combos.