Please help. It’s worth 4 marks

asked Apr 17, 2024 69.1k views

2 votes

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5 votes

Answer:

f=(3+4d)/(3+d)

Explanation:

$d= (3(1-f))/((f-4)) \\(f-4)d=3-3f\\f-4=(3-3f)/(d) \\f=(3-3f+4d)/(d) \\f+(3f)/(d) =(3+4d)/(d) \\fd+3f=3+4d\\f(d+3)=3+4d\\f=(3+4d)/(3+d)$

Munni answered Apr 23, 2024

by Munni

8.3k points

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