Answer:
The value of the variable=13 meters
Step-by-step explanation:
Step 1
Express the dimensions of the pool
Length=7+x
width=6
Step 2
Express the area of a rectangle as shown;
A=L×W
where;
A=area of a rectangle
L=length of the rectangle
W=width of the rectangle
In our case;
A=120 m²
L=x+7
W=6
replacing in the equation;
120 m²=(x+7)×6
120=6 x+42
6 x+42=120
6 x=120-42
6 x=78
x=78/6
x=13
The value of the variable=x=13 meters
Answer:
i believe it would be the las one im pretty sure but not 100% so hope it works and let me know if im right or not but again hope this helps
step-by-step explanation:
Answer:
y=3x-2
Step-by-step explanation:
your question didn't have any instructions so this might not be what you're looking for
set them equal to each other
-3x+4=3x-2
-3x-3x=-2-4
-6x=-6
x=1
plug in x=1
y=3(1)+4 =7
y=3(1)-2 =1
so, when x=1, y=1 in the expression y=3x-2
Answer: 
Step-by-step explanation:
Given : Sample size : n= 9
Degree of freedom = df =n-1 =8
Sample mean : 
sample standard deviation : 
Significance level ; 
Since population standard deviation is not given , so we use t- test.
Using t-distribution table , we have
Critical value = 
Confidence interval for the population mean :
90% confidence interval for the mean value will be :
Hence, the 90% confidence interval for the mean value=
Answer:is 5 ^ -2 ????
Step-by-step explanation:
