Ответ: 35. 52.
Пошаговое объяснение:
(5 2/9y+3 1/3)•3-7 2/3y;
Упрощаем:
1) 5 2/9y*3 + 3 1/3 *3 = 47/9y*3 + 10/3*3=47/3y+ 10=15 2/3y+10;
2) 15 2/3y+ 10-7 2/3y= 15 2/3y-7 2/3y +10=8y+10;
3) при y=3 1/8, 8y+10 равно:
8*3 1/8 +10 = 8*25/8+10=25+10=35.
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(3 5/18b+2 1/6)•6-7 2/3b;
1) (3 5/18b+2 1/6)•6=3 5/18b*6 + 2 1/6*6=59/18b*6 + 13/6*6=59/3b+13=
=19 2/3b+13;
2) 19 2/3b+13-7 2/3b =19 2/3b-7 2/3b +13=12b+13;
3) при b=3 1/4, 12b+13 равно:
12*3 1/4 + 13 =12*13/4 + 13 = 3*13 +13 = 39+13=52.
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Answers & Comments
Ответ: 35. 52.
Пошаговое объяснение:
(5 2/9y+3 1/3)•3-7 2/3y;
Упрощаем:
1) 5 2/9y*3 + 3 1/3 *3 = 47/9y*3 + 10/3*3=47/3y+ 10=15 2/3y+10;
2) 15 2/3y+ 10-7 2/3y= 15 2/3y-7 2/3y +10=8y+10;
3) при y=3 1/8, 8y+10 равно:
8*3 1/8 +10 = 8*25/8+10=25+10=35.
---------------------
(3 5/18b+2 1/6)•6-7 2/3b;
Упрощаем:
1) (3 5/18b+2 1/6)•6=3 5/18b*6 + 2 1/6*6=59/18b*6 + 13/6*6=59/3b+13=
=19 2/3b+13;
2) 19 2/3b+13-7 2/3b =19 2/3b-7 2/3b +13=12b+13;
3) при b=3 1/4, 12b+13 равно:
12*3 1/4 + 13 =12*13/4 + 13 = 3*13 +13 = 39+13=52.