What integer can be represented by 16 positive tiles and 26 negative tiles?

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)