The price of a used textbook after a 35% markdown is $28.60. What was the original price?
1 answer:
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Answer:
Step-by-step explanation:
GIVEN: A fence is to be built to enclose a rectangular area of square feet. The fence along three sides is to be made of material that costs
dollars per foot, and the material for the fourth side costs
dollars per foot.
TO FIND: Find the dimensions of the enclosure that is most economical to construct.
SOLUTION:
Area of rectangular fence
let the length of fence
let the width of fence
let be the smaller side
Area of rectangular fence enclosure
cost of fence along three sides
cost of fence along fourth side
length of fence
cost of fence building
putting value of
to find minimum value differentiating the equation
Hence the dimensions of the enclosure that is most economical to construct are and
Answer:
B(4, - 3 )
Step-by-step explanation:
We have A(2, - 7) and C(7, 3 )
Using the section formula to calculate the coordinates of B
=
=
=
= 4
=
=
=
= - 3
Hence B(4, - 3 )