Answer:
- 2 ≤ n < 8
Step-by-step explanation:
The closed circle at - 2 indicates that n can equal - 2
The open circle at 8 indicates that n cannot equal 8
Otherwise n can be all value between - 2 and 8 including - 2, thus
- 2 ≤ n < 8
Answer:
14
Step-by-step explanation:
7+7
That's a trapezoid,


Answer: 32
But say we didn't know the formula. We can chop out the 4 by 4 square and we have two 45/45/90 triangles side 4 left over, so two 4 by 4 squares,
A = 2(4)(4) = 32
We can think of this as 12 by 4 rectangle with two 4 by 4 right triangles chopped out:
A = 12(4) - 2(1/2)(4)(4) = 48 - 16 = 32
The formula for the nth term is
a1 + (n-1)d where a1 = first term and d = common difference
Well any number that would round to 30 has to be over 25 so if that's all the information they give you, the number can we any where from 25 to 29.999... Also saying that it could be a different number