Step-by-step explanation:
B. -16 + (-7) ...this is the same as -16-7
Answer:
Therefore (x,y)=(3,7)
Step-by-step explanation:
put the second equation into the first
x+4=3x-2
x-3x=-2-4
-2x=-6
x=3
plug x=3 into the second equation
y=3+4=7
An obtuse triangle has one obtuse angle, or an angle that measures more than 90° but less than 180°. Options 1 and 2 are not correct, because these are acute angles.
So, one of the angles must be 40°, and the other may be 100° or 120°.
The measures of the angles in a triangle add up to 180°.

The other two angles are 40° and 100°.
Answer:
x = -1
y = -3 or
x = -3
y = -5
Step-by-step explanation:
-1 - (-3) =
-1 + 3 = 2
-3 - (-5) =
-3 + 5 = 2