3,5 * 10⁻⁶ / 7 * 10⁻⁴ = 0,5 * 10⁻² = 0,5 / 100 = 0,005
Объяснение:
d) коэффициент 7\8 и степень 3
152. 1) (5m-2n)/10k : (5m-2n)/10k^2 = (5m-2n)/10k * 10k^2/(5m-2n) = k
2) (p+3)/(p^2-2p) : (p+3)/(4p-8) = (p+3)/p(p-2) * (4(p-2))/p+3 = 4/p
3) (a^2-b^2)/2ab : (a+b)/ab = ((a-b)(a+b))/2ab * ab/(a+b) = (a-b)/2
4) 18b/(b^2-16) * (b+4)/3b = (6*3b)/(b-4)(b+4) * (b+4)/3b = 6/(b-4)
5) 6/(m^2-9n^2) * (m-3n) = 6/((m+3n)(m-3n)) * (m-3n) = 6/(m+3n)
6) (3c-9)/(9c^2+6c+1) * (3c+1)/(c-3) = (3(c-3))/(3c+1)^2 * (3c+1)/(c-3) = 3/(c+3)
4A+3a=130
A+a=36
A=36-a
4(36-a)+3a=130
144-4a+3a=130
-a=-14
a=<em><u>14</u></em>
A=36-14=<u><em>22</em></u>
<u><em>Ответ: 22 в тяжелом и 16 в легком</em></u>
X-6y=20
<span>4x+2y=2
х=20+6у
4(20+6у) + 2у = 2
80+24у +2у=2
26у=2-80
26у=-78
у=3 возвращаемся к 3 строчке: х=20+6*3
х=20+18
х=38</span>