When both pipes are working together, how long does it take them to fill the tank?minutes

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)