Select all the expressions that are equivalent to the polynomial below. (-19x2 − 4x - 7) + (4x2 + 25x − 5)
(-7x2 − 21x + 13) − (8x2 + 8x + 25)
-2(7x + 1) − 5(3x2 + 3x + 2)
(-17x2 + 2x − 3) + (2x2 − 31x − 9)
(5x2 − 10x + 8) − (10x2 + 19x + 20)
-2(4x − 15) − 3(5x2 + 7x + 6)

What is the area of triangle pqr on the grid? a triangle pqr is shown on a grid. the vertex p is on ordered pair 7 and 6, vertex q is on ordered pair 1 and 6, and the vertex r is on ordered pair 4 and 2. 5 square units 6 square units 10 square units 12 square units

Answer this 30 points and brainliest!

Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores