Which equation shows the substitution method being used to solve the system of linear equations? x – y = 7 x = y 3 a. x – y = y 3 b. x = (7 – x) 3 c. (y 3) – y = 7 d. x – (y 3) = 7

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

If you answer 2+2 you will get over 80 points

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?