Question

7. Which conditional and its converse are both true?

A. If x = 3, then x2 = 6.
B If x = 1, then 2x = 2.
C. If x = 2, then x2 = 4.
D. If x2 = 4, then x = 2.

Answer 1

What do you think?

A. If x^2 = 100, then x=10.

x = 10 isn't the only solution.

B. x^2= 100 if and only if x= 10 or = -10

Not bad.

C. If x= -10, then x^2 = 100

That's easy enough to demonstrate.

D. if x = 10, then x^2 = 100

That's easy enough to demonstrate.

Where does that leave us?

Answer 2

D.!

Answer 3

?? (10)^2 = 100. Noe. That one works.

Answer 4

B.

Answer 5

Why are you guessing? Look at my discussion. See which one works and which doesn't.

Answer 6

I'm Sorry /.\ All Of Them Works except a because as you said, it is not the only solution

Answer 7

Answer is A.