calvin had saved 550.00 he went shopping and bought 5 new cds for 19.95 each a new mp3 player for 124.99 and 6.new dvds for 12.97 each how much money does calvin now have

249.44

Step-by-step explanation:

5 CDs each = 19.55 6 DVDs each =12.97

19.55×5 =97.75 12.97×6=77.82

mp3= 124.99

124.99+97.75+77.82=300.56

550.00-300.56=249.44

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.

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