Answer:
x= 11
Step-by-step explanation:
or, 9x-18=81
or, 9x=81+18
or, 9x=99
or, x=99/9
or, x=11
Answer:
37
Step-by-step explanation:
all triangles have a total of 180 degrees
set up equation and solve
180=(2x+4)+(2x-9)+x
180=5x-5
185=5x
37=x
Using the Fundamental Counting Theorem, it is found that 80 different scores are possible if everyone gets at least one point.
<h3>What is the Fundamental Counting Theorem?</h3>
It is a theorem that states that if there are n things, each with
ways to be done, each thing independent of the other, the number of ways they can be done is:

There are 4 darts, and for each dart 3 possible scores, hence:

Hence the number of possible scores, removing the one score with zero points on all four rounds, is:
N = 3 x 3 x 3 x 3 - 1 = 80.
More can be learned about the Fundamental Counting Theorem at brainly.com/question/24314866
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Multiply each side by 4 then divide by three. The answer is C.