Answer:
r=4
Step-by-step explanation:
-4 (r+2) =4 (2-2r)
Divide each side by 4
-4/4 (r+2) =4/4 (2-2r)
-(r+2) = (2-2r)
Distribute
-r-2 = 2-2r
Add 2r to each side
-r+2r -2 = 2-2r+2r
r-2 =2
Add 2 to each side
r-2+2 =2+2
r=4
Check
-4 (r+2) =4 (2-2r)
-4 (4+2) =4(2-2*4)
-4(6) =4(2-8)
-24 = 4(-6)
-24 = -24
This checks
Answer:
a
Step-by-step explanation:
slope= rise/run
y-intercept= where the slope intersects with the y-axis
have a great day! :)
Answer:
2x+9=12x-21
-2. -2
9=10x -21
+21 +21
30=10x
Divide by 10 on both sides
30/10
x=3
Step-by-step explanation:
The answer to this question is the cognitive psychologists. A cognitive psychologists are professionals that deals with the studying of the mind and mental processes. Also cognitive psychologist deals and helps patients with developing their memory, reasoning, and even in their decision making.
<span>Each Exterior Angle = (360 degrees) ÷ (Number of Sides)
Each Interior Angle = 180 - (360 / Number of Sides)
Therefore, since one angle is 4 times the other then,
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4 * (360 degrees) / (Number of Sides) = <span>180 - (360 / Number of Sides)
Number of sides = 10 (it is a decagon)
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