HELP PLEASE 1) A rectangle has a length that is 5 less than four times its width. Find what simplified expression represents the perimeter of this rectangle. (Show work)

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

Solve 2x+y=3 x+y=5 in substitution method

Which of the following is true for the relation f(x)=2x^2+1