Resolver las siguientes operaciones 9/18 + (-4/18)

6/9 - (-3/4)

(-1/5) - (-3/7)

13/5 - 19/2

(-8/5) + 1/7

(-3 2/5) + (-5/3)

Which expression is equivalent to? assume x > 0 and y > 0.

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

Is the figure congruent? yes or no?