Ten circles are all the same size. Each pair of these circles overlap but no
circle is exactly on top of another circle. What is the greatest possible total number of
intersection points of these ten circles?
(A) 40
(B) 70
(C) 80
(D) 90
(E) 110

d. 90 times

Step-by-step explanation:

took the test got it right

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

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step-by-step explanation: