How many solutions are there to the following system of equations? 2x+5y=-11 10x+25y=-55

Solve for x i'll try to attach the files bc it's not letting me for some reason

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have

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