1.Adição e subtração de monômios e polinômios a) ( + 7x) + ( - 3x )=
b) ( - 8x) + (+ 11x)+ ( - 9 x )=
c) ( - 2y) + ( - 3y + 9 )+ ( 6y +2 )=
d) (- 2m) + ( - m )=

SOCORRO

Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

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