18.Efectúa las siguientes multiplicaciones: a)(4x + 3y) (x + 2y)
b)(2xy + 3)
c)
d)(2x2y5) (3x2y3 – 5x7y + 2x –9y)
e)

True or false. the baltic states have taken steps to diversify. or decrease the variety of their industries

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation

Why do so many children develop illnesses in southern africa? a. poor nutrition due to poverty c. very bad air pollution b. climate many diseases thrive d. declining life expectancy