Answer:
1. C
2. C
Step-by-step explanation:
1. 5x+12=57
Subtract 12 from both sides
5x=45
Divide both sides by 5
x=9
2. 7-4x=12-3x
Combine like terms =
-4x+3x=-12-7
x=-12-7
x=19
The explicit formula for the geometric sequence
is

Step-by-step explanation:
The formula of the nth term of a geometric sequence is
, where:
- a is the first term of the sequence
- r is the common ratio between the consecutive terms
The geometric sequence of
is 6 , -2 ,
,
, 
∵
= 6
∵ 
∵
= -2
∴ 
- Divide both term by 2 to simplify it
∴ 
∵ 
- Substitute the value of
and r in the rule above
∴ 
The explicit formula for the geometric sequence
is

Learn more:
You can learn more about the geometric sequence in brainly.com/question/1522572
#LearnwithBrainly
Explanation:
Addition Property Of Equality.
We can see the person adds 3/4 to each sides.
This action is to keep the equation equal but also eliminate the -3/4 on the left side.
3x^4+2x^4
x^4+x^4+x^4+x^4+x^4
=5x^4 simplified.
hope this helps!