Question

ПАМАГИТЕЕЕЕЕЕЕЕЕ!!!!!!!!УМАЛАЮЮЮЮЮЮЮЮЮЮЮЮЮ!!!!!ДАЮ 100БАЛОВ​

Answer 1

Ответ:

$\displaystyle 1)\ \ y=\dfrac{1}{3}\, x+8\\\\a)\ \ y=\dfrac{1}{3}\ \ \to \ \ \ \dfrac{1}{3}=\dfrac{1}{3}\, x+8\ \ ,\ \ \frac{1}{3}\, x=\frac{1}{3}-8\ \ ,\ \ \frac{1}{3}x=-\frac{23}{3}\ \ ,\\\\x=-3\cdot \frac{23}{3}\ ,\ x=-23\\\\b)\ \ y=0,3\ \ \to \ \ \ 0,3=\frac{1}{3}\, x+8\ \ ,\ \ \frac{1}{3}\, x=0,3-8\ \ ,\ \ \frac{1}{3}\,x=-7,7\ \ ,\\\\x=-3\cdot 7,7\ \ ,\ \ \ x=-23,1\\\\c)\ \ y=8\ \ \to \ \ 8=\frac{1}{3}\, x+8\ \ ,\ \ \ \frac{1}{3}\, x=0\ \ ,\ \ x=0$

$\displaystyle d)\ \ y=30\ \ \to \ \ \ 30=\frac{1}{3}\, x+8\ \ ,\ \ \frac{1}{3}\, x=30-8\ \ ,\ \ \frac{1}{3}\, x=22\ ,\ \ x=66$

$2)\ \ y=0,01x-2,5\\\\a)\ \ y=2,5\ \ \to \ \ \ 2,5=0,01x-2,5\ \ ,\ \ 0,01x=5\ \ ,\ \ x=500\\\\b)\ \ y=0,01\ \ \to \ \ 0,01=0,01x-2,5\ \ ,\ \ 0,01x=2,51\ ,\ \ x=251\\\\c)\ \ y=\dfrac{1}{25}\ \ \to \ \ \dfrac{1}{25}=0,01x-2,5\ \ ,\ \ 0,01x=2,54\ \ ,\ \ x=254\\\\\\3)\ \ y=\dfrac{1}{8}+25\%\ x\ \ \to \ \ y=\dfrac{1}{8}+\dfrac{1}{4}\, x\\\\a)\ \ y=\dfrac{1}{4}\ \ \to \ \ \dfrac{1}{4}=\dfrac{1}{8}+\dfrac{1}{4}\, x\ \ ,\ \ \dfrac{1}{4}\, x=\dfrac{1}{8}\ \ ,\ \ x=\dfrac{1}{2}=0,5$

$b)\ \ y=0,5=\dfrac{1}{2}\ \ \to \ \ \dfrac{1}{2}=\dfrac{1}{8}+\dfrac{1}{4}\, x\ \ ,\ \ \dfrac{1}{4}\, x=\dfrac{3}{8}\ \ ,\ \ x=\dfrac{3}{2}=1,5\\\\c)\ \ y=10\ \ \to \ \ 10=\dfrac{1}{8}+\dfrac{1}{4}\, x\ \ ,\ \ \dfrac{1}{4}\, x=\dfrac{79}{8}\ \ ,\ \ x=\dfrac{79}{2}=39,5$