Can someone tell me the answer ( why is it 37) pl

I know this looks super complicated, but it is 37 students were surveyed. This is because more than one could have said they had brothers or sisters. For example:

In a batch of 10 kids,

- 3 kid could have no siblings

- 2 could have (a) sister(s)

- 2 could have (a) brother(s)

- 3 could have (a) brother(s) and (a) sister(s)

*The ( ) is for if they had 1 or more siblings*

This example isn't as specific, but that could be a reason why you got the answer wrong. If the logical answer is 67, well pff, I say what the heck? I was right. Whoever created this test/assignment is stupid.

I hope this helps!

Step-by-step explanation:

24+27=51

Then 10 people had both sister and brother, so 10x2(for both of them) =20

51-20=31

31+the people who had no siblings at all(6)= 37!!!

HOPE THIS HELPED!! SORRY IF ITS CONFUSING :/

3. parallelogram

step-by-step explanation:

we turn each of our sides into direction vectors

ab=b-a=(3 - 7, 1 - 0) = (-4, 1)

bc=c-b=(1,6)

cd=d-c=(4,-1)

da=a-d=(-1,-6)

we see how the opposite sides have negated direction vectors; this is characteristic of a parallelogram.   we have congruent sides ab=cd and bc=da with unequal lengths because 1^2+6^2 is different from (-4)^2+1^2.   so it's not a square or a rhombus.  

we check the dot product of direction vectors of adjacent sides.   we have

ab dot bc = -4(1) + 1(6) = 2

that's not zero so the sides are not perpendicular.   we've ruled out rectangle.

the direction vectors indicate two pairs of congruent parallel sides, so we choose parallelogram over trapezoid.

y=mx+