There are twenty classes at northwestern middle school and twenty classes at southeastern middle school. the number of students in each class at each school is shown in the dot plots below.

number of students in each class at northeastern middle school

number of students in each class at southeastern middle school

michela says that the modes of the two data are the same so the median and mean must also be the same. what is michela’s error?

the modes are not the same.

the means and medians are not the same.

only the modes and the medians are the same.

only the modes and the means are the same.

The means and medians arent the same

Step-by-step explanation:

guy above me is right credit for him

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.

3,000,540

step-by-step explanation: