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Oduvanchick [21]
2 years ago
6

I need help I’ll give branliest

Mathematics
2 answers:
valkas [14]2 years ago
5 0

Answer:

B

Step-by-step explanation:

we know the thickness is x, so the sides are 3+2x and 4+2x

then we use foil:

(3+2x)(4+2x)=12+6x+8x+4x^2=4x^2+14x+12

we know the area is 15

4x^2+14x+12=15

4x^2+14x-3=0

So it is B

katovenus [111]2 years ago
3 0

Answer:

A

Step-by-step explanation:

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