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klio [65]
2 years ago
8

Solve for b B=??????

Mathematics
1 answer:
kozerog [31]2 years ago
4 0

Answer:

\frac{b-7}{b+1}=\frac{b-10}{b+4}

\left(b-7\right)\left(b+4\right)=\left(b+1\right)\left(b-10\right)

\left(b-7\right)\left(b+4\right)=b^2-3b-28

\left(b+1\right)\left(b-10\right)=b^2-9b-10

b^2-3b-28=b^2-9b-10

b^2-3b-28+28=b^2-9b-10+28

b^2-3b=b^2-9b+18

b^2-3b-\left(b^2-9b\right)=b^2-9b+18-\left(b^2-9b\right)

6b=18

\frac{6b}{6}=\frac{18}{6}

b=3

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Answer: x=25, y=19

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3 years ago
A field is a rectangle with a perimeter of 1240 feet. The length is 400 feet more than the width. Find the width and length of t
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Answer:  The length is 510 and the width is 110.

Step-by-step explanation:

To find the area of a rectangle, you will have to add the 2 times the length plus 2 times the width because  a rectangle have 4 sides. Two widths and two  lengths.

You can now use the formula  P= 2l + 2w  

were P is the perimeter , l is the length, and w is the width.

the length is 400 more than the width, so we can represent that by the equation,  l = w + 400  

And now we know that the width is w.

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Check :

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2 years ago
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3)
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4)
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3 years ago
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