Пусть а - число правильных ответов, с - число неправильных ответов. Тогда число вопросов, на которые ответы даны не были - 25-а-с 5*а-9*с=40 с у нас больше либо равно 1, тогда делаем методом подстановки, не забывая, что а - обязательно целое число. с=1 5а-9=40, 5а=49, а - число не целое, значит, не подходит. с=2 5а-18=40, 5а=58, а - число не целое, значит, не подходит. с=3 5а-27=40, 5а=67, а - число не целое, значит, не подходит. с=4 5а-36=40, 5а=76, а - число не целое, значит, не подходит. с=5 5а-45=40, 5а=85, откуда а =17. ответ: 17.
People have always valued such character qualities as honesty, truthfulness and sincerity. However, some of them believe that there are many situations when lying can help solve various problems.
As for me, people should always try to be honest with others. Firstly, being trustworthy makes relationships stronger and sincerer because if a person tells a lie once, it will be very hard to regain trust. Secondly, being honest helps gain a reputation and makes one respected. Finally, telling the truth helps feel relaxed and safe because a person will never have to worry about the truthfulness of his or her words.
On the other hand, some people think that telling a white lie on occasion helps solve millions of problems.
5*а-9*с=40
с у нас больше либо равно 1, тогда делаем методом подстановки, не забывая, что а - обязательно целое число.
с=1
5а-9=40, 5а=49, а - число не целое, значит, не подходит.
с=2
5а-18=40, 5а=58, а - число не целое, значит, не подходит.
с=3
5а-27=40, 5а=67, а - число не целое, значит, не подходит.
с=4
5а-36=40, 5а=76, а - число не целое, значит, не подходит.
с=5
5а-45=40, 5а=85, откуда а =17.
ответ: 17.
Пошаговое объяснение:
People have always valued such character qualities as honesty, truthfulness and sincerity. However, some of them believe that there are many situations when lying can help solve various problems.
As for me, people should always try to be honest with others. Firstly, being trustworthy makes relationships stronger and sincerer because if a person tells a lie once, it will be very hard to regain trust. Secondly, being honest helps gain a reputation and makes one respected. Finally, telling the truth helps feel relaxed and safe because a person will never have to worry about the truthfulness of his or her words.
On the other hand, some people think that telling a white lie on occasion helps solve millions of problems.