Answer:x=4
Step-by-step explanation:
-4 is the answer, because -4^3=-64.
Multiply -4 by itself 3 times:
-4x-4x-4
-4 times -4 is -16.
-16 times -4 is -64.
I hope this helped!
An irrational number has an endless decimal. Perfect Squares are rational numbers.
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
Step-by-step explanation:
10-4= 6x9= 54-0=0
hope this helps✨
You would multiply 12/2=6$ 6*3=18$ for 3 magazines