Answer:
19
Step-by-step explanation:
Call made in the 3rd month = total calls made - calls made in the first month - call made in the 2nd month
56 - 24 - 13 = 19 calls
Answer:
x=1,y=3
correct answer is (1,3)
Step-by-step explanation:
We can quickly eliminate y by subtracting one equation from the other
(-2x+y=1)-(-4x+y=-1)
2x=2
x=1
plug x=1 into equation 1
-2(1)+y=1
y=1+2=3
