Answer:
y = 4
x= 7
Step-by-step explanation:
First you would rearrange the first equation x-7y=-21 and make x the subject:
x= -21 +7y
Then substitute x into the 2nd equation to find y:
13x - 7y= 63
13(-21+7y) - 7y = 63
-273 + 91y -7y = 63
-273 + 84y=63
84y = 63 + 273
84y = 336
y = 4
Once you have y you can substitute this into any of the original equations to find x, for example:
x - 7y = -21
x - 7(4) = -21
x - 28 = -21
x = -21 +28
x= 7
Ok, so 8. is adjacent because it makes up a 90 angle and number 13. is vertical because it has 2 lines going through each other.
Answer:
-- State-A . . . Population = 1 · (1.08)ˣ
-- State-B . . . Population = 2 · (1.08)ˣ
' x ' = number of years after the original population
At the beginning, x=0.
Any quantity raised to the zero power = 1.
At the beginning, when x=0, the original populations were
State-A = 1 · 1 = 1
State-B = 2 · 1 = 2
The original population of State A was half of
the original population of State B.
this isn't my answer but hope it helps