Simplify the algebraic expression: x(x + 3) + x(2x - 4) + 6

What is sin 7x/4 ? i need on this urgent trig

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?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2