Isabelle is mixing red paint with blue paint to make purple paint. she adds of a fluid ounce 3/10 of red to 11/15 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple. how many fluid ounces of red paint will she need to make 3 fluid ounces of purple paint?

if you will tell me how to do this and show me what you did? ?

the one on the bottom left

step-by-step explanation:

all of the other ones have a specific pattern

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.