Answer:
y = 2
x = 5
Step-by-step explanation:
4x + 5y = 10 | ×3 |
3x - 3y = 21 | ×4 |
12x + 15y = 30
12x - 12y = 84
____________--
27y = -54
y = -54/27
y = 2
4x + 5y = 10 | ×3 |
3x - 3y = 21 | ×5 |
12x + 15y = 30
15x - 15y = 105
____________+
27x = 135
x = 135/27
x = 5
9 x 0.55 = 4.95, which can be rounded to the ones place.
5 books remain.
Answer:
1500
Step-by-step explanation:
1481 to the nearest hundred is 1500 because 8 is nearer to 10
2.47 + 7.1
7.1 + 2.47
9.57-7.1
9.57-2.47
