Answer:
y = 2
Step-by-step explanation:
3y - 4 = 6 - 2y
→ Add 2y to both sides to isolate 6
5y - 4 = 6
→ Add 4 to both sides to isolate 5y
5y = 10
→ Divide both sides by 5 to find the value of y
y = 2
Answer:
28
Step-by-step explanation:
784 can be divided by two 4 times.
This means that there are two pairs of 2s that can come out the radical.
2*2 = 4.
then now we have 49 left inside and we know that this is 7 squared, meaning that there is a pair of 7 inside the radical.
7 comes out and now we have 7 times 4 which is 28.
Answer:
P(45<X<81) = P(-3<z<3)=0.9974 or 99.74%
Step-by-step explanation:
Mean = 63
Standard Deviation =6
We need to find probability that X lies between 45 and 81 i.e P(45<X<81)
First we will find z-score for X=45 and X=81
For X=45 the z-score can be found using formula:
Putting values and finding z-score
For X=45, z-score is -3
For X=81 the z-score can be found using formula:
Putting values and finding z-score
For X=81, z-score is 3
Now finding the probability of P(-3<z<3)
It can be solved as:
P(-3<z<3)=P(z<3)-P(z<-3)
Looking at the z-score table to find
P(z<3)= 0.9987
P(z<-3)=0.0013
So, P(-3<z<3)=P(z<3)-P(z<-3)
P(-3<z<3)=0.9987 - 0.0013
P(-3<z<3)=0.9974
or P(-3<z<3)= 99.74%
So, P(45<X<81) = P(-3<z<3)=0.9974 or 99.74%
Answer:
2+1=3
Step-by-step explanation:
you just switch the 1 and the 2 around