70р - 100%
30р - х
40р - у
х=(30×100%)/70=43%
у=(40×100%)/70=57%
1) 57%-43%=14%
2)57%-43%=14%
1.)12,8-11,36=1,44
2)5,2*2,3=11,96
3)1,44+11,96=13,4
4)13,4:0,6=22,(3)
А). √2 * (√64\√8) = √2 * √(64\8) = √2 * √8 = √2 * √(4*2) = √2 * 2√2 = 2(√2*<span>√2)=2*2=4
</span>б1).√3\4 * √9\16 = (3<span>√3) \ 64</span>
б2). √3\4 * √9\16 = √(3\16) * √(9\256) = √ ((3\16)*(9\256)) = √(27\4096) = √27\√4096 = √27\64 = √(3*9) \ 64 = (3√3)\64