Please help me find the difference and tell me what to type, i will mark brainliest

What signals you that factoring by grouping is the best method to use when factoring a problem?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Fa bus driver leaves her first stop by 7: 00 a.m., her route will take less than 37 minutes. if she leaves after 7: 00 a.m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?