Distribute 3x(5x-5)

a) 12x^2+8x
b) 15x^2-15x
c) 12x^2-9x
d) 15x^2+10x​

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Combine like terms to make a simpler expression 3z+z

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?