Category: Others

Question Number 6495 by sanusihammed last updated on 29/Jun/16 $${A}\:{refrigerator}\:{is}\:{rated}\:\mathrm{20}\:{watts}\:{of}\:{electricity}\:{which} \\ $$$${cost}\:\mathrm{5}{k}\:{per}\:{kwh}\:,\:{what}\:{is}\:{the}\:{cost}\:{of}\:{operation}\:{for}\:\mathrm{20}\:{days}. \\ $$ Answered by sandy_suhendra last updated on 30/Jun/16 $$\mathrm{20}\:{days}×\mathrm{24}\:{hour}×\mathrm{20}\:{watts}=\mathrm{9600}\:{wh}=\mathrm{9}.\mathrm{6}{kwh} \\ $$$${it}'{s}\:{cost}=\mathrm{9}.\mathrm{6}×\mathrm{5}{k}=\mathrm{48}{k} \\…

Question Number 137528 by I want to learn more last updated on 03/Apr/21 Commented by I want to learn more last updated on 03/Apr/21 $$\mathrm{Find}\:\mathrm{the}\:\mathrm{radius}\:\mathrm{of}\:\mathrm{the}\:\mathrm{circle}.…

Question Number 137437 by I want to learn more last updated on 02/Apr/21 Answered by mr W last updated on 02/Apr/21 $$\frac{{r}−\mathrm{2}}{{r}+\mathrm{2}}=\frac{\mathrm{6}−{r}}{\mathrm{6}+{r}} \\ $$$${r}^{\mathrm{2}} =\mathrm{12}…

Question Number 71852 by Rio Michael last updated on 21/Oct/19 $${show}\:{that}\:\mathrm{5}^{\mathrm{22}} \:+\:\mathrm{17}^{\mathrm{22}} \:\equiv\:\mathrm{6}\:\left({mod}\:\mathrm{11}\right) \\ $$ Answered by mind is power last updated on 21/Oct/19 $$\mathrm{ferma}\:\mathrm{little}\:\mathrm{theorem}…

Question Number 71838 by Rio Michael last updated on 20/Oct/19 $${solve}\:{the}\:{system}\:{of}\:{linear}\:{congruences}\: \\ $$$$\:{x}\:\equiv\:\mathrm{2}\:\left({mod}\:\mathrm{3}\right) \\ $$$${x}\:\equiv\:\mathrm{4}\left({mod}\:\mathrm{5}\right) \\ $$$${x}\:\equiv\:\mathrm{7}\:\left({mod}\:\mathrm{9}\right) \\ $$$${x}\equiv\:\mathrm{11}\left(\:{mod}\:\mathrm{13}\right) \\ $$$${using}\:{the}\:{Brute}\:{force}\:{method} \\ $$ Commented by…