Answer:
Not solveable
Step-by-step explanation:
because that to solve the two unkown number you must have two equations of it in order to solve it
Answer:
x=10, y=-6
Step-by-step explanation:
1) express x from the first equation x+y=4 x=4-y
2) It is the system of equations, so both equations are simultaneous.
you can replace x to 4-y in the second one
2 *(4-y) +3y=2
8-2y+3y= 2
y=-6
x= 4-y=4-(-6)=10
The answer is x=10, y=-6
Answer:


Step-by-step explanation:
Answer: 0.0432
Step-by-step explanation:
Formula of Margin of Error :-

Given : Sample size : n= 400
The proportion of individuals use public transportation.=
Level of confidence = 0.95
Significance level : 
Critical value : 
Substitute the values in the given formula , we get

Hence, the margin of error for the confidence interval for the population proportion with a 95% confidence level. = 0.0432