The rectangle has a length of (x+5) and a width of 3x. Choose the area (a) and the perimeter (p).
A. a=8x+10, p=3x2 +15
B. a=3x2+15x, p=8x+10
C. a=3x+15x, p=3x+6
D. a=x2 +10, p=4x+5
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The rectangle has a length of (x+5) and a width of 3x. Choose the area (a) and the perimeter (p).
A. a=8x+10, p=3x2 +15
B. a=3x2+15x, p=8x+10
C. a=3x+15x, p=3x+6
D. a=x2 +10, p=4x+5
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Answer:
It's letter B po
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Verified answer
Answer:
B. a=3x²+15x, p=8x+10
Step-by-step explanation:
We know that in order to get the area of the rectangle, we need to use the formula A=lw
Where:
l = length
w= width
Solution:
The given values for the rectangle are the expressions (x+5) for the length and 3x for the width, so that:
A=lw
A= (x+5)(3x)
A= 3x² + 15x ➡️ Final answer
*If you know how to multiply algebraic expressions then you will know the answer.
We know that in order to get the perimeter of the rectangle, we need to use the formula A=2(l+w)
Where:
l = length
w = width
Solution:
The given values for the rectangle are the expressions (x+5) for the length and 3x for the width, so that:
A=2(l+w)
A=2(x+5+3x)
A=2(4x+5)
A=8x+10 ➡️ Final answer
*If you know how to add and to mutiply algebraic expressions then you must know the answer.