Answer:
(48.3875, 51.6125)
Step-by-step explanation:
At 99% level of significance


From the normal standard deviation table 
Considering that
±
=50±
50±2.33(0.625)=50±1.6125=(48.3875, 51.6125)
Therefore, there’s 99% confidence that the mean lifetime of a certain brand of tires is between 48.3875 and 51.6125
Answer:
7 pieces
Step-by-step explanation:
5 1/4 m divided by 3/4 m= 7 pieces
Answer:
Read below.
Step-by-step explanation:
Possible equations with x as 3:
2x=6
3x=9
4x=12
5x=15
10x=30
10+2x=16
4x+32=44
23-5x= 8
42÷2x=7
2x × 2=12
These are just a few possibilities with x as 3.
Y=4 is going to be the answer.