Stupid buying a $35 tool. the store reduces the price by 5% and then applies an $8 off coupon. how much will stu pay for the tool?

Stupid pay for the tool is $25.3 (Approx) .

Step-by-step explanation:

Stupid buying a $35 tool.

The store reduces the price by 5% and then applies an $8 off coupon.

5% is written in the decimal form.

= 0.05

Price reduces = 0.05 × 35

                       = $ 1.75

Total cost of the tool = Original cost of tool - Price reduces - Coupon off

Here

Original cost of tool = $35

Coupon off = $8

put in the above

Stupid pay for the tool = 35 - 1.75 - 8

                                  = 35 - 9.75

                                  = $25.3 (Approx)

Therefore Stupid pay for the tool is $25.3 (Approx) .

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.