Need can someone explain to me the steps how you got it is need to understand it

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X+ y = 5 ; x - y =3 solve using linear combination

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?

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?