"Perimeter" is the distance all the way around the drawing. If the drawing has sides, then the perimeter is the SUM of the lengths of all the sides. It's exactly the distance an ant would have to walk along the line, to get all the way around to where he started from.
To get the perimeter of the triangle, you have to add up the lengths of the three sides.
(2a - 3) + (2a) + (3a + 1) =
2a - 3 + 2a + 3a + 1 .
Add up all the 'a's: 2a + 2a + 3a = 7a
Add up all the just plain numbers: -3 + 1 = -2
Write them together, as a binomial: 7a - 2
THAT's your expression for the perimeter.
Answer:
2 & 3
Step-by-step explanation:
they both equal -7
the temp dropped 7 degrees
Tan(61)= x/16 --> 16 x tan(61) = 59.89 = 59.9
Answer: (-0.086, 0.026)
Step-by-step explanation:
The confidence interval for the difference of two population proportion is given by :-
Given : Significance level : 
Critical value : 
Sample size : 
The 90% confidence interval for the difference in the population proportions will be :-
