At a shoe store there are 40 pairs of shoes. 8 pairs are yeezys.15 pairs of all shoes have velcro and 2 yeezys have velcro. How many pairs of shoes are not yeezys and do not have velcro

40 - 15 - 2= 23 we simply do not count the yezzys until they mention velcro and just takeaway 15 pairs of shoes and 2 velcro, yezzy that have velcro

are 2 so it must be 23.

Step-by-step explanation:

17

Step-by-step explanation:

add the number of shoes with velcro, not including the 2 yeezys because their already included with the total number of yeezys, to the number of yeezys

15 + 8 = 23

subtract 23 from 40

40 - 23 = 17

17 of the shoes aren't yeezys and do not have velcro

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.

step-by-step explanation: