Plz me i am suck!

which counterexample disproves the conjecture?
if a perfect square is odd, then its square root is multiple of 3?
a: 4
b: 9
c: 25
d: 81

which counterexample disproves the conjecture?
if n is a positive integer , then 2n - 1 is a prime number.
a: n = 6
b: n = 5
c: n = 3
d: n = 2

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation:

b. hannah is playing with her cousin at