The formula below gives I, the interest earned by depositing p dollars in a bank account at annual interest rate r for one year.

I = pr

If a deposit earns $75 of interest, which equation gives the principal p as a function of the interest rate r?

Can Someone please help

Question

The formula below gives I, the interest earned by depositing p dollars in a bank account at annual interest rate r for one year. 

I = pr 

If a deposit earns $75 of interest, which equation gives the principal p as a function of the interest rate r?

Can Someone please help

solomonzelman · Answer

it sounds like your question has options to it (we don't need the options to solve it, but if there are options, please post them)

solomonzelman · Answer

if you need a function of p, in terms of r, when p=75, then:
divide both sides by r, and mlup in 75 for p

solomonzelman · Answer

*plug, not mlup

anonymous · Answer

here are the answers...
 		A.	p = 75r
 		B.	p = r/75
 		C.	p = 75 – r
 		D.	p = 75/r

anonymous · Answer

@SolomonZelman

anonymous · Answer

try the triangle trick. it always helps me.

anonymous · Answer

|dw:1419902815253:dw|