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The dimension of one side of the stamp was 2 centimeters
Step-by-step explanation:
The formula of the area of any square is A = l², where l is the 
length of the side of the square
lance bought a square postage stamp to a mail a card to his cousin
∵ The stamp has 4 square centimeters
∴ The area of the stamp = 4 cm²
∵ The stamp shaped a square
∵ The formula of the area of the square is A = l²
- Equate the formula of the area of the square by the area of the stamp
∴ l² = 4
- Take √ for both sides to find l
∴ 
∴ l = 2 cm
The dimension of one side of the stamp was 2 centimeters
Learn more:
You can learn more about the area of the shapes in brainly.com/question/10677255
#LearnwithBrainly
 
        
             
        
        
        
Answer:
Slope = 1
Step-by-step explanation:
 
        
             
        
        
        
Answer:
see explanation
Step-by-step explanation:
To find the x- intercept let y = 0 in the equation and solve for x
x + 0 = 9 
x = 9 ← x- intercept ⇒ (9, 0 )
To find the y- intercept let x = 0 in the equation and solve for y
0 + y = 9
y = 9 ← y- intercept ⇒ (0, 9 )