Answer:
I say A
Step-by-step explanation:
because it is the highest point.
The solution to the system of equation is (14, 6)
1 / 2 x = 10 - 1 / 2 y
8 = x -y
Therefore, let's combine the equation.
<h3>Simultaneous equation:</h3>
1 / 2 x + 1 / 2 y = 10
x - y = 8
x + y = 20
x - y = 8
2y = 12
y = 12 / 2
y = 6
x = 20 - 6
x = 14
Therefore, the solution of the system of equation is (14, 6)
learn more on system of equation here: brainly.com/question/8914228?referrer=searchResults
Answer: 4
Step-by-step explanation:
The answer for the first question is the second option.
The answer for the second question is 192
Answer:
20,176,803
Step-by-step explanation:
This geometric series has a first term of 3 and a common ratio of 21/3 = 7. The formula for the sum of n terms of a series with first term a1 and common ratio r is ...
Sn = a1·(r^n -1)/(r -1)
For a1=3, n=9, and r=7, the sum is ...
S9 = 3·(7^9 -1)/(7 -1) = 3·40353606/6 = 20,176,803
The sum of the first 9 terms is 20,176,803.
_____
The first 9 terms are ...
3 +21 +147 +1029 +7203 +
50,421 +352,947 +2,470,629 +17,294,403
