Samuel has a collection of toy cars. his favorites are the 27 red ones which make up 60%, percent of his collection. how many toy cars does samuel have?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?