find (x+y)+(x-y) ij x=5/2 y=-3/4
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Answer:
By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past
By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the pastBy studying the fossil record we can tell how long life has existed on Earth, andBy studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where theyBy studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other.By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us a lot about the past
(5/2-3/4)÷[5/2-(-3/4)]
7/4÷[5/2+3/4]
7/4÷13/4
7/13