Other Math Archive: Questions from June 23, 2023
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asap reaaly help me pls
\[ y \sec ^{2} x d x+(\tan x+y) d y=0, \mathrm{y}(\mathrm{o})=1 \] a. \( x \tan y-x^{2}=1 \) b. \( y \cot x-y^{2}=1 \) c. \( \sin x-\cos y=0 \) d. \( y \tan x+\frac{y^{2}}{2}=\frac{1}{2} \)2 answers -
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Un mecánico, ayudado por su asistente, puede reparar un motor en 5 horas. Trabajando solo, el mecánico podría reparar el motor en 6 horas. ¿Cuánto tiempo le tomará al asistente reparar el motor2 answers -
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\( \left\{\begin{array}{r}x+y+z=0 \\ 8 x-y-z=0 \\ -x+8 y+8 z=0\end{array}\right. \) \( \begin{array}{l}\left\{\begin{array}{rr}x_{1}+3 x_{2}+2 x_{3}+2 x_{4}= & 4 \\ x_{1}+x_{2}+3 x_{3} & =3 \\ 2 x_{12 answers