When shrinking an image, the size of each side is shrunk by the scale factor. However the area is not shrunk by the same factor. Area is a squared measurement (when finding the area of a rectangle we take length x width; two measurements, so a squared answer), so the area will be shrunk by the scale factor squared; in this case the area is shrunk by 3² or 9. This means the new area would be 720/9 or 80 square inches.
If philani buys a scooter for 15,000 and wants to pay 15% down then he must pay 2,250. After this they will still need to pay 12,750 to pay of the scooter, but after the 10% annually (for two years) then they will owe 15,750 for the scooter rather than 12,750. Hope this helps!
Answer:
4 puzzles would cost $41.50
X + y = -3 . . . (1)
y = 2x + 2 . . . (2)
substituting (2) into (1) gives, x + 2x + 2 = -3
3x = -5
x = -5/3
From (2), 2(-5/3) + 2 = -10/3 + 2 = -4/3
Required solution (-5/3, -4/3)
