How many solutions does this SOE have ?

At least 20

Step-by-step explanation:

I don't know what your answer options are or if there are more solutions beyond the picture. By counting the blue dots on the red line, you have your answer, which I counted 20 from what is seen.

*Note: Since there are dots all over the line, I assume there are likely more than the 20 shown. Hence, why I said "at least 20." If that isn't one of your options, then I would just say 20, because that is what is shown.

Edit: I saw on another one of your problems that an answer is "infinite answers" or something. That is your answer for this.

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%