Предмет: Математика, автор: dashhhhulja

Прошу помогите решить номер 70 прошу решите кто поможет получит 35 баллов лучший ОТВЕТ И СПАСИБО!!!!!!!!
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dashhhhulja: Прошу срочно

dashhhhulja: Прошу помогите

dashhhhulja: Прошу

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Автор ответа: Iryn95

Пошаговое объяснение:

Периметр треугольника можно найти по формуле :

Р= a+b+c, где

a,b,c- стороны

По условию :

Р= 16х-12

АС= 3х- 4

АВ= 6x -3

СВ = ?

Две стороны будут равны :

АС+ АВ= (3x-4)+(6x-3)= 3х-4+6х-3= 9х-7

Зная периметр ( 16х-12 ) можем найти третью сторону :

СВ=Р- (АС+АВ)

подставим наше значение (АС+АВ)

СВ= (16x-12) -(9x-7)= 16x -12 -9x +7= 7x- 5

сторона СВ= 7х-5

При х= 8 , стороны треугольника будут равны :

АС= 3*8-4= 24 -4= 20 ед.

АВ= 6*8-3= 48 -3= 45 ед.

СВ= 7*8 -5= 56 - 5= 51 ед.

Периметр треугольника будет равен

Р= 20+45+51= 116 ед.

Symba123: Молоток тоже

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Прошу помогите решить номер 70 прошу решите кто поможет получит 35 баллов лучший ОТВЕТ И СПАСИБО!!!!!!!!
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