When a plane flies against the wind, its 1800-mile trip takes 4 hours. The
return trip with the wind only takes 3 hours. Find the speed of the plane
without wind and the average wind speed. Write your answer in this form:
(plane speed, wind speed) = (#, #) *

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.

If f(x) = -2x2 - 3 and g(x) = 3x - 4, then f(g(2))=