Zany Zoo (with Zebras)
Algebra
Level
1
A zoo contains a certain number of zebras and ostriches in the same area. If there are a total of 44 feet and 30 eyes, how many zebras are there?
9
7
4
8
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1 solution
a=number of zebras
b=number of ostritches
A zebra has 2 eyes and 4 feet. An ostritch has 2 eyes and 2 feet. We have the two equations,
2a + 2b = 30 (equation1)
4a + 2b = 44 (equation 2)
Subtracting (equation 2) from (equation 1), we get
-2a = -14
a=7 (answer)
Marvin