Which value of x satisfies the equation 4x - 7 = 25

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

What are mountains that divide european russia from asian russia?

Compare and contrast the four types of crystals