Answer:
f(4)=6
Step-by-step explanation:
replace a with 4
f(4)=2(4+2)-6
the multiply thingy(i forgot what it was called ok) (2*4 and 2*2)
f(4)=8+4-6
do the easy math(i will write it out anyways though)
f(4)= 12-6
f(4)=6
i havnt done this for a while but this is what i remeber
dont report me if i was wrong pls
131+108+107+110+x=540
456 + x = 540
-456 -456
x = 84
Answer:
The answer is 8 dimes
Step-by-step explanation:
4 quarters x 2 = 8
8 dimes
1.00 + 0.80 = $1.80
Answer:
d. 0.0023
Step-by-step explanation:
Calculation for the probability of getting a sample average of 1.8 or less
Using this formula
z score =(X-mean)/Standard errror
Where,
Standard error =Standard deviation/√(n)
Let plug in the formula
P(Xbar<1.8)=P(Z<(1.8 hours per day -2.2 hours per day)/(2 hours /√(200))
P(Xbar<1.8)=P(Z<-0.4/(2/14.14))
=P(Z<-0.4/0.1414)
=P(Z<-2.83)
Now let find the Z score of P(Z<-2.83) using the z table
P=0.0023
Therefore the probability of getting a sample average of 1.8 or less is:0.0023