Пошаговое объяснение:
1. 4/5 * 6. 2/3 = 9/5 * 20/3 = 3/1 * 4/1 = 12/1 = 12
4. 1/2 * 2. 4/5 = 9/2 * 14/5 = 9/1 * 7/5 = 63/5 = 12. 3/5
3. 3/11 * 7. 1/3 = 36/11 * 22/3 = 12/1 * 2/1 = 24/1 = 24
10. 2/7 * 1. 2/9 = 72/7 * 11/9 = 8/7 * 11/1 = 88/7 = 12. 4/7
2. 1/2 * 18/25 = 5/2 * 18/25 = 1/1 * 9/5 = 9/5 = 1. 4/5
5. 1/7 * 3. 8/9 = 36/7 * 35/9 = 4/1 * 5/1 = 20/1 = 20
4. 1/2 * 14/45 = 9/2 * 14/45 = 1/1 * 7/5 = 7/5 = 1. 2/5
3. 3/5 * 5. 5/8 = 18/5 * 45/8 = 9/1 * 9/4 = 81/4 = 20. 1/4
1. 1/24 * 11. 1/5 = 25/24 * 56/5 = 5/3 * 7/1 = 35/3 = 11. 2/3
12. 4/5 * 3. 1/8 = 64/5 * 25/8 = 8/1 * 5/1 = 40/1 = 40
1. 2500 - (80а + 130в) останется бумаги, если изготовят 80 тетрадей и 130 альбомов
2. 43
3. 19 - 17а
4. х = (16 - у)/2
5. -14 1/6
2. 6x+5y-3ху, при x=-2; y=5
6*(-2) + 5*5 - 3*(-2*5) = -12 + 25 + 30 = 43
3. 3(3-а) + (а-4) — 7(2a-1) + 12 - (5+а) = 9-3а+а-4-14а+7+12-5-а = 19 - 17а
4. у = 2x+16 х = (16 - у)/2
5. 35(-0,2) – (-0,2) : (-0,03) + 1/2 = -7 - 6 2/3 + 1/2 = -13 4/6 + 3/6 =
-13 7/6 = -14 1/6
Пошаговое объяснение:
1. 4/5 * 6. 2/3 = 9/5 * 20/3 = 3/1 * 4/1 = 12/1 = 12
4. 1/2 * 2. 4/5 = 9/2 * 14/5 = 9/1 * 7/5 = 63/5 = 12. 3/5
3. 3/11 * 7. 1/3 = 36/11 * 22/3 = 12/1 * 2/1 = 24/1 = 24
10. 2/7 * 1. 2/9 = 72/7 * 11/9 = 8/7 * 11/1 = 88/7 = 12. 4/7
2. 1/2 * 18/25 = 5/2 * 18/25 = 1/1 * 9/5 = 9/5 = 1. 4/5
5. 1/7 * 3. 8/9 = 36/7 * 35/9 = 4/1 * 5/1 = 20/1 = 20
4. 1/2 * 14/45 = 9/2 * 14/45 = 1/1 * 7/5 = 7/5 = 1. 2/5
3. 3/5 * 5. 5/8 = 18/5 * 45/8 = 9/1 * 9/4 = 81/4 = 20. 1/4
1. 1/24 * 11. 1/5 = 25/24 * 56/5 = 5/3 * 7/1 = 35/3 = 11. 2/3
12. 4/5 * 3. 1/8 = 64/5 * 25/8 = 8/1 * 5/1 = 40/1 = 40
1. 2500 - (80а + 130в) останется бумаги, если изготовят 80 тетрадей и 130 альбомов
2. 43
3. 19 - 17а
4. х = (16 - у)/2
5. -14 1/6
Пошаговое объяснение:
1. 2500 - (80а + 130в) останется бумаги, если изготовят 80 тетрадей и 130 альбомов
2. 6x+5y-3ху, при x=-2; y=5
6*(-2) + 5*5 - 3*(-2*5) = -12 + 25 + 30 = 43
3. 3(3-а) + (а-4) — 7(2a-1) + 12 - (5+а) = 9-3а+а-4-14а+7+12-5-а = 19 - 17а
4. у = 2x+16 х = (16 - у)/2
5. 35(-0,2) – (-0,2) : (-0,03) + 1/2 = -7 - 6 2/3 + 1/2 = -13 4/6 + 3/6 =
-13 7/6 = -14 1/6