Answer:
- using the rule given: 2.5
- using an exponential rule: 7
Step-by-step explanation:
Evaluating the linear rule given, for n = 1, we have ...
a1 = 7(1/2)(1) -1 = 7/2 -1 = 5/2 = 2.5
_____
We suspect you may intend the exponential function ...
an = 7(1/2)^(n-1)
Then, for n = 1, we have ...
a1 = 7(1/2)^(1 -1) = 7(1) = 7 . . . . the first term is 7
_____
When writing an exponential expression in plain text, it requires the exponential operator, a caret (^). If the exponent contains any arithmetic, as this one does, it must be enclosed in parentheses.
Answer: b
Step-by-step explanation:
In the last question, you wrote on a second equation "13x ...." kkk
Let's go:
We have to check each one answer in the following system:
x - 2y = 7
3x + 7y = 8
I can use the substituition method to solve this system...
x = 7 + 2y
3x + 7y = 8
3(7 + 2y) + 7y = 8
21 + 6y + 7y = 8
13y = 8 - 21
13y = -13
y = -1
x = 7 + 2.(-1)
x = 5
Finally, the correct answer is the second one (letter b).
Answer:
n = 2
Step-by-step explanation:
5n - 12 = -3n + 4
5n + 3n = 4 + 12
8n = 16
n = 2
You keep adding 2 and 1/3 to get your answer
Answer:
The Proof for 
is below.
Step-by-step explanation:
To Prove:
Proof:
We know law of indices
Therefore,
Step 1: Applying law of indices
Step 2: Taking common 
we get
Step 3: 
so add 5 + 1 we get
Step 4: Cancel 6 from both denominator and numerator we get
...That is Divisible by 6 Proved
