Answer:
3) r = 1.5
7) y = 18
11) x = -10
Step-by-step explanation:
3) Isolate the variable by dividing each side by factors that don't contain the variable.
7) Solve for y by simplifying both sides of the equation, then isolating the variable.
11) Move all terms that don't contain x to the right side and solve.
Answer:5,5,yes
Step-by-step explanation:
Answer: 90% confidence interval would be 
Step-by-step explanation:
Since we have given that
n₁ = 50
Number of metal tagged penguins survived = 10
So, 
n₂ = 50
Number of electronic tagged penguins = 18
So, 
So, at 90% confidence interval, z = 1.28
So, interval would be
Hence, 90% confidence interval would be
Answer:
perimeter = 48 in
Explanation:
The perimeter of the shape is the sum of its side lengths.
We are given that the shape is a regular octagon. This means that it has eight equal sides.
Therefore:
perimeter of regular octagon = 8 * side length
Since the side length is given = 6 in, therefore:
perimeter = 8 * 6 = 48 in
Hope this helps :)
Answer:
True
Step-by-step explanation:
The n th term rule for an arithmetic sequence is
= a + (n - 1)d
where a is the first term and d the common difference
here d = 9 - 7 = 2 and a = 7, thus
= 7 + 2(n - 1)
