могут ли быть смежными два острых угла

срединно-океанические хребет являются границами между.......???
помогите пожалуйста?!((( 

(ПЕРЕВЕДИТЕ ПОЖАЛУЙСТА ТОЛЬКО ТОЧНО СРОЧНО НАДО)

It is safe that most pet owners feel a special bond with their animal companions.They are always there to comfort you,listen to you,and console you when you are down.However,their ability to help people goes much further than emotional support.there are multiple cases where pets have helped people with physical ailments such as dogs detecting cancer and seizures.Animals have also been shown to help people cope with emotional troubles like depression,and pets have improved the quality of life for people in nursing homes.Several medical reports have credited animals with other positive effects on people lives such as: -LOWERING BLOOD PRESSURE AND STRESS FOR EVERY DAY PEOPLE. -HELPING PEOPLE COPE WITH THE LOSS OF A LOVED ONE AND OTHER MAJOR LIFE CHANGES. -BETTER COMMUNICATION IN MARRIAGES. -SERVICE ANIMALS LIKE SEEING-EYE DOGS HELP PEOPLE WITH CANCER,ALZHEIMER'S AND AIDS. -HIGHER SURVIVAL RATES FOR PEOPLE WITH CORONARY HEART DISEASE -BETTER SOCIALIZATION OF YOUNG CHILDREN WITH PEERS AND DEVELOPMENT OF NURTURING BEHAVIOR. -GIVING A SENSE OF CONSTANCY TO FOSTER CHILDREN -IMPROVING RESULTS FOR ANXIOUS AND DEPRESSED PEOPLE -THERAPEUTIC HORSE BACK RIDING HAS HELPED IMPROVE BALANCE,POSTURE,MOBILITY,LANGUAGE AND MUSCLE COORDINATION -HELPING FACILITATE SOCIAL INTERACTIONS BETWEEN STRANGERS AND IMPROVING SOCIAL BEHAVIOR FOR MENTALLY IMPAIRED PEOPLE AND PRISONERS. More recreational activity such as dog walking in the past 15 years,scientists the world over have established beyond doubt the therapeutic value of animal companions.In Cambridge,England,researchers discovered that,within a month of taking a cat or dog into their home,new owners reported a "highly significant" reduction in minor ailments.

Предложение со словом приключение

Докажите что при любом натуральном m значение выражения 12(3m-4)+5(3m-4)делится на 17.