Ответ:32кв.см. Площадь 4 частей
Пошаговое объяснение:
98:15=6 целых остаток 8
15 х6=90- это целая часть
98-90=8 -это остаток
проверка
15 х6 +8=98
78:19=4 целых остаток 2
19х4=76
78-76=2
проверка
19х4+2=78
49:18=2 целых остаток остаток13
18х2=36
49-36=13
проверка
18х2+13=49
Уравнение прямой, проходящей через 2 точки:
![\frac{x-x_1}{x_2-x_1}=\frac{y-y_1}{y_2-y_1}\\\\A(-3;1)\; ,\; \; B(1;5)\; ,\; \; C(7;3)\\\\AB:\; \; \frac{x+3}{1+3}=\frac{y-1}{5-1}\; ,\; \; \frac{x+3}{4}=\frac{y-1}{4}\; \; \to \; \; x+3=y-1\; ,\; \; y=x+4\\\\AC:\; \; \frac{x-3}{7+3}=\frac{y-1}{3-1}\; ,\; \; \frac{x+3}{10}=\frac{y-1}{2}\; \; \to \; \; x+3=5(y-1)\; ,\; \; y=\frac{x}{5}+1\frac{3}{5}\\\\BC:\; \; \frac{x-1}{7-1}=\frac{y-5}{3-5}\; ,\; \; \frac{x-1}{6}=\frac{y-5}{-2}\; \; \to \; \; \frac{x-1}{-3}=y-5\; ,\; \; y=-\frac{x}{3}+5\frac{1}{3}](https://tex.z-dn.net/?f=+%5Cfrac%7Bx-x_1%7D%7Bx_2-x_1%7D%3D%5Cfrac%7By-y_1%7D%7By_2-y_1%7D%5C%5C%5C%5CA%28-3%3B1%29%5C%3B+%2C%5C%3B+%5C%3B+B%281%3B5%29%5C%3B+%2C%5C%3B+%5C%3B+C%287%3B3%29%5C%5C%5C%5CAB%3A%5C%3B+%5C%3B+%5Cfrac%7Bx%2B3%7D%7B1%2B3%7D%3D%5Cfrac%7By-1%7D%7B5-1%7D%5C%3B+%2C%5C%3B+%5C%3B+%5Cfrac%7Bx%2B3%7D%7B4%7D%3D%5Cfrac%7By-1%7D%7B4%7D%5C%3B+%5C%3B+%5Cto+%5C%3B+%5C%3B+x%2B3%3Dy-1%5C%3B+%2C%5C%3B+%5C%3B+y%3Dx%2B4%5C%5C%5C%5CAC%3A%5C%3B+%5C%3B+%5Cfrac%7Bx-3%7D%7B7%2B3%7D%3D%5Cfrac%7By-1%7D%7B3-1%7D%5C%3B+%2C%5C%3B+%5C%3B+%5Cfrac%7Bx%2B3%7D%7B10%7D%3D%5Cfrac%7By-1%7D%7B2%7D%5C%3B+%5C%3B+%5Cto+%5C%3B+%5C%3B+x%2B3%3D5%28y-1%29%5C%3B+%2C%5C%3B+%5C%3B+y%3D%5Cfrac%7Bx%7D%7B5%7D%2B1%5Cfrac%7B3%7D%7B5%7D%5C%5C%5C%5CBC%3A%5C%3B+%5C%3B+%5Cfrac%7Bx-1%7D%7B7-1%7D%3D%5Cfrac%7By-5%7D%7B3-5%7D%5C%3B+%2C%5C%3B+%5C%3B+%5Cfrac%7Bx-1%7D%7B6%7D%3D%5Cfrac%7By-5%7D%7B-2%7D%5C%3B+%5C%3B+%5Cto+%5C%3B+%5C%3B+%5Cfrac%7Bx-1%7D%7B-3%7D%3Dy-5%5C%3B+%2C%5C%3B+%5C%3B+y%3D-%5Cfrac%7Bx%7D%7B3%7D%2B5%5Cfrac%7B1%7D%7B3%7D)
Медиана ВМ:
![\frac{x-2}{1-2}=\frac{y-2}{5-2}\; ,\; \; \frac{x-2}{-1}=\frac{y-2}{3}\; \; \to \; \; 3x-6=-y+2\; ,\; y=-3x+8](https://tex.z-dn.net/?f=+%5Cfrac%7Bx-2%7D%7B1-2%7D%3D%5Cfrac%7By-2%7D%7B5-2%7D%5C%3B+%2C%5C%3B+%5C%3B+%5Cfrac%7Bx-2%7D%7B-1%7D%3D%5Cfrac%7By-2%7D%7B3%7D%5C%3B+%5C%3B+%5Cto+%5C%3B+%5C%3B+3x-6%3D-y%2B2%5C%3B+%2C%5C%3B+y%3D-3x%2B8)
100-15=85%=0,85
56*0,85=47,6 года