At the farmers’ market, you can buy 3 melons for $10.50, 6 melons for $21, or 9 melons for $31.50. What is the unit rate for buying melons?

A) $3.50 per melon
B) $5.75 per melon
C) $10.50 per melon
D) $63.00 per melon

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.

125 yards

step-by-step explanation:

i take 75 plus 50.

step-by-step explanation: