First, let's calculate the area of the rectangle. Find the distances between the length and the width. For the width we can use point A and point D.
(2, 2) and (20, 2)
20 - 2 = 18
So the width is 18 cm. Now find the length. We can use point A and point B.
(2, 2) and 2, 26)
26 - 2 = 24
So the length is 24.



So the area of the rectangle is 432 square centimeters, now let's find the area of the circle.
The radius is given as 15 cm. Use 3.14 to approximate for pi.




So the area of the circle is approximately 706.5 square centimeters. Subtract this area from the area of the rectangle to find the value of the shaded area.
Answer:
first one : (7+12+3+4+4+8)*2=76
4000 divide by 160 to get the cost of each book
4000 / 160 = 25
So that's £25 per book, multiply that by two because they gave two away which is £50 so they lost £50
Study these words as you'll use them later in your math course and later in future courses. I recommend making flash cards.
Here are the answers to help you make the flash cards or to help you study.
1. Product
2. Difference
3. Coordinate
4. Rational
5. Prime
6. Undefined
7. Irrational
8. Integer
9. Factor
10. Element