Casey paid $32 for a book that was on a sale at 20% off. What was the original price for that book?
2 answers:
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Answer:
368 sq. units.
Step-by-step explanation:
We have a square of side lengths 20 units and we cut four congruent isosceles right triangles from the corners of the square.
Now, the four isosceles right triangles have one leg equal to 4 units.
Therefore, the area of four triangles = sq. units.
Now, we have the area of the given square is (20 × 20) = 400 sq. units.
Therefore, the area of the remaining octagon will be (400 - 32) = 368 sq. units. (Answer)
Answer:
Length of other board metres
Step-by-step explanation:
Given: Length of board = metres
Length of board was divided into two.
Length of one piece = metres
Let = length of the other board
Length of the other board = Length of board - Length of one piece
So,
Thus, length of the other board metres