Answer:
-4
Step-by-step explanation:
Adding 21 and -21 cancel each other out so you're left with -4
Answer:
b. The supplements of congruent angles are congruent
Explanation:
Note that
is a supplement of
and
is a supplement of
.
Since
,
because
the supplement of the congruent angles are congruent.
Let's solve for x.
2x−9y=14
Step 1: Add 9y to both sides.
2x−9y+9y=14+9y
2x=9y+14
Step 2: Divide both sides by 2.
2x
/2
=
9y+14
/2
x=
9
/2
y+7
Answer:
x=0, y=-5
Step-by-step explanation:
The system is
(1) 5x+3y=-15
(2) -8x-2y=10
Let's solve it by elimination. In order to do it, you have to multiply the equations by suitable numbers in such a way that when you add the 2 equations, one of the unknowns is eliminated
Multiply (1) by 2 and (2) by 3
(1) 10x+6y=-30
(2) -24x-6y=30
Add the two equations
10x-24x+6y-6y=-30+30 ----> -14x=0---->x=0
Now replace this value in any equation, for example in (1)
6y=-30 ----> y=-30/6----> y=-5
Answer:
44/12 = 11/3 = 3 2/3
Step-by-step explanation:
