Answer:
i think its 10 or 20
Step-by-step explanation:
The first one would be 120 the second one would be 68
Answer: x=−1 and y=4
Step-by-step explanation:
20 markers are needed to cover the 10 kilometers.
Answer:
x = 1, y = 1
Step-by-step explanation:
3x - 4y = -1
5x + 2y = 7
If we multiply the whole second equation by 2, we get:
10x + 4y = 14
Adding this to the first equation:
10x + 4y + 3x - 4y = 14 - 1
13x = 13
x = 1
Applying this to the second equation:
5 (1) + 2y = 7
2y = 2
y = 1