Using these axioms : commutativity, associativity,, distributivity, the additive identity, multiplicative identity, additive inverse, cancellation and replacement property.

prove the following statement

if a, b et and a +b=0 then, b= -a.

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

Select the number of ways in which a line and a circle can intersect

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"