Answer:
It's the first one
Step-by-step explanation:
Because 2M means you are multiplying all the values of M with 2
Hello!
I take that the "/" was meant to be a fraction. There fore, your answer would be

.
Enjoy.
~Isabella
9514 1404 393
Answer:
y = (x +7)/3
Step-by-step explanation:
Multiply the given equation by y/3:

Answer:
18 and 72
Step-by-step explanation:
the smaller part can be assigned as x while the larger will be 4x. Both numbers need to add up to 90, giving the equation: 4x+x = 90
Solve:
4x+x = 90
5x = 90
x = 18
4x = 72
Answer: (0.4247,0.7753)
Step-by-step explanation:
Given : Sample size : n=30
Number of people graduated from a registered welding course =18
The probability of people graduated from a registered welding course :
Significance level : 
Critical value : 
A confidence interval for population proportion is given by :-

Hence, the 95 percent confidence interval for the proportion of all welders who graduated from a registered welding course = (0.4247,0.7753)