1200 - 100\% 100\% -x =?
1020 - x
1200 * x = 1020 * 100
x = 1020 * 100 / 1200
x = 85
1) 100\% - 85\% = 15\%
ответ 15\%
1)(47+6x-27):8=7
47+6x-27=8×7
<span>47+6x-27=56
</span>47+6x=27+56
47+6x=83
6x=83-47
6x=36
x=36÷6
X=6
<span>(sin^2t + cos^2t) - 3sinpi + 7cospi =
= (1) -3*(0) +7*(-1) = 1-3-7 = -9</span>
1)45*2=90=1.30
2)11.55+1.30=13.25
3)14.10-13.25=55
2a(-4;2)
3b(9;-3)
n(-4+9; 2-3)
n(5:-1)