Answer:
90 Degrees.
The angle which is equal to its supplement is 90 degrees.
The middle number is:
9.4 + ((17.9-9.4)/2) = 13.65
Or you can find it like this:
(9.4+17.9)/2=13.65
Answer:
-12
Step-by-step explanation:-3y+12=48
48-12= 36
36/ (-3) = -12
Answer:2m^2+mn+2m+9n-3
Step-by-step explanation:
m(2+n-m)+3(3n+m^2-1)
open brackets
2m+mn-m^2+9n+3m^2-3
Collect like terms
3m^2-m^2+mn+2m+9n-3
2m^2+mn+2m+9n-3
