2000+1300+1700=5000 общая сумма вложенных денег
5000 - 100%
2000*100/5000=40%
1700*100/5000=34%
1300*100/5000=26%
1)х-3≤3х-1, х+1≤4
-2≤2х, х≤3
-1≤х, х≤3
-1≤х≤3
<span>2) 3х+1> x+5? 5x-4>6
</span><span>2х> 4, 5x>10
</span><span>х> 2, x>2
</span><span><span>x>2
</span>3) x+1≤ 7, 4x>3x-2</span>
x≤ 6, x>-2
-2<x≤ 6
Ответ
а)3m^2-11m+4-6m^2+2m+3= -3m^2-9m+7
б)6x^3+15x^2-7x
в)2x^3-2x+10x^2-10-10x^2=2x^3-2x-10
Y=3x³-2x
x=0 y=3*0-2*0=0
x=-1 y=3*(-1)³-2*(-1)=-3+2=-1