The correct way to solve this equation would be:
7=5+3(x-4)
Distribute the Brackets.
3*x=3x
3*4=12
7=5+3x-12
Add like terms.
7=-7+3x
Add 7 to both sides.
(7)+7=(-7+3x)+7
14=3x
Divide both sides by 3.
(14)/3=(3x)/3
4.6667 or 14/3 =x
Both answers are incorrect.
Some the significant mistakes:
-Didn't follow BEDMAS
-How did 7=8(x-4) turn into 78=x-4?
Hope this helps.
-Benjamin
Answer:
13,397 ft
Step-by-step explanation:
tan 15 = height/50,000
0.2679(50,000) = 13,397 ft
Answer: (a) (602.95,705.37)
(b) 33
Step-by-step explanation:
(a) Given : Sample size :
Sample mean :
Standard deviation :
Significance level :
Critical value :
The confidence interval for population mean is given by :-
Hence, the 95% (two-sided) confidence interval for true average level in the population of all homes from which the sample was selected.
(b) Given : Standard deviation :
Margin of error :
Significance level :
Critical value :
The formula to calculate the sample size is given by :-
Hence, the minimum required sample size would be 33.
Answer: x=84
Step-by-step explanation: Solve for x by simplifying both sides of the equation, then isolating the variable.
I hope this helps you out. :)