Answer:
21
Step-by-step explanation:
the numbers are multiplying by 3
I believe it would be the last answer. All you have to do is the pencil test to see if its negative or positive slope.
The area of the farm is the number of trees on it.
Each row of the farm does not have 50 trees
Let
<em />
<em> number of rows</em>
<em />
<em> number of trees in each row</em>
<em />
So, we have:
<em />
<em> --- twice less than the number of rows</em>
The area of the farm is:

Where
--- the number of trees
So, we have:

Substitute 

Substitute 50 for x




The above equation is not true.
This means that, each row does not have 50 trees
Read more about areas at:
brainly.com/question/16418397
Answer:
he earned 14 dollars
Step-by-step explanation:
if you are looking for how much did he earn you take the number that they started with and subtract it from what they have after so the equation is $21-$7 and thats how much he eaened