Answer:
a. an = -1 • 4^(n - 1)
Step-by-step explanation:
It's easy see that each term is multiplied by 4 to get the next term, so the common ratio will be 4, that reduces the choices to answers A and B (since C and D use -1 as common ratio). Also, normally a geometric progression uses "n-1", so we'll first try with A to see if it works.
a1 = (-1) * 4^0 = -1 * 1 = -1
a2 = (-1) * 4^1 = -1 * 4 = -4
a3 = (-1) * 4^2 = -1 * 16 = -16
Yes, it works... so the answer is an = -1 • 4^(n - 1)
Wish i could help you don’t have a lot of information
Answer:
NW = 15.6 cm
Step-by-step explanation:
If ΔLMN ~ ΔNWR then:





Find NW by using Pythagoras' Theorem:

(where a and b are the legs, and c is the hypotenuse, of a right triangle)
Given:
- a = RN = 6 cm
- b = RW = 14.4 cm
- c = NW
Substituting the given values into the formula and solving for NW:




Answer:
It would by 1/8 divided by 5! Which will equal 1/40
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
- Plug 8 in: 12 - [2 + 6 ÷ (10 - 8)]
- 10 - 8 = 2
- Plug 2 in: 12 - [2 + 6 ÷ (2)]
- 6 ÷ 2 = 3
- Plug 3 in: 12 - [2 + 3]
- 2 + 3 = 5
- Plug 5 in: 12 - 5
- 12 - 5 = 7
I hope this helps!