Answer:
90
Step-by-step explanation:
make sure to use BIDMAS
start of by working out everything in the brakets first.
the first bracket would be 50
the second bracket would be -40
the minus these as there is a minus between the brackets
50--40=90
The question is incomplete..a , b are two different variables and such can't be solved with only one given interlinked condition.
Answer:
The lines for each pair of equations are perpendicular, because the slopes for both of these have negative reciprocals.
Step-by-step explanation:
-5x+10y=5
x-2y=-1
2y=x-(-1)
2y=x+1
y=1/2x+1/2
Answer:
![-3a^2 - 5a + 4](https://tex.z-dn.net/?f=-3a%5E2%20-%205a%20%2B%204)
Step-by-step explanation:
N/A