Company A needs 110 days to rebuild a bridge. Company B needs 150 days to rebuild the same bridge. Working together, they can do the job in d days. Which equation can be used to find the value of d?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest