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A. is right
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Answer:
6*17
6*7=42
6*17=42
6*17=60
6*17=42+60
=102
Step-by-step explanation:
Answer:
The side of square A is 30 cm.
Step-by-step explanation:
Given that,
The dimensions of square A are three times the dimensions of square B.
The area of square A is 900 sq cm.
Side of square A = 3( side of square B)
Let the side of square B is b. So,
Side of square A, a = 3b
We know that, the area of square is side². So,

Side of square A, a = 3(10) = 30 cm
Hence, the side of square A is 30 cm.
X^2+3x+1+4x-1+2x^2
Combine like terms:
x^2+2x^2=3x^2
3x+4x=7x
1+(-1)=0
Solution:
3x^2+7x
All you can do here is simplify it