Answer:
z=-75/17
Step-by-step explanation:
Expand this equation:
-4z+8+4=-21z-63
-4z+21z=-63-8-4
17z=-75
z=-75/17
Answer:
6x5x5
Step-by-step explanation:
the square is a 5x5
and there are 6 of those squares
so it is 6x5x5
So you're initial equation is

. Well since

, plug in 24 for the 1 in

. So

, and

so

.
Answer:
4 weeks
Step-by-step explanation:
15 + 2x = 23
2x = 8
x = 4
Answer:

You gave the explicit form.
Step-by-step explanation:
You gave the explicit form.
The recursive form is giving you a term in terms of previous terms of the sequence.
So the recursive form of a geometric sequence is
and they also give a term of the sequence; like first term is such and such number. All this says is to get a term in the sequence you just multiply previous term by the common ratio.
r is the common ratio and can found by choosing a term and dividing by the term that is right before it.
So here r=-3 since all of these say that it does:
-54/18
18/-6
-6/2
If these quotients didn't match, then it wouldn't be geometric.
Anyways the recursive form for this geometric sequence is
