Answer:
Step-by-step explanation:
f(1) = 160
f(n + 1) = -2 * f(n)
n = 1
f(2) = -2*f(1)
f(2) = -2*160
f(2) = - 320
f(3) = - 2*f(2)
f(3) = -2 * - 320
f(3) = 640
f(4) = -2 * f(3)
f(4) = -2 * 640
f(4) = - 1280
Answer:
B. (2a +3b)(4a -c)
Step-by-step explanation:
Group the terms pairwise, then factor each pair.
... (8a² -2ac) +(12ab -3bc)
2a is a common factor in the first pair of terms; 3b is a common factor in the second pair of terms. We can factor those out.
... = 2a(4a -c) +3b(4a -c)
Then we see that (4a-c) is a common factor in the result. We can factor that out.
... = (2a +3b)(4a -c) . . . . matches selection B
Answer:
x=2.875
Step-by-step explanation:
sorry if this is wrong. It's a weird number
First, review how you would go about finding an average. If you look only at the 5 scores given, 16, 12, 15, 13 and 17, you'd add these up and divide the sum by the number of scores (5).
Now suppose there's a 6th game and your score is x.
Add up the first 5 scores as before, and then add x to indicate the 6th score. Divide this sum by 6 (because there are now 6 scores).
Solve the resulting equation for x. Show your work, please.