Question

A boy buys x eggs at at (x-8) pence each and (x-2) loafs of bread at (x-3) pence each. If the total bill is £1.75, how many eggs does he buy???

Answer 1

i guess you are supposed to solve
\[x(x-8)+(x-2)(x-3)=1.75\]

Answer 2

This seems like the way you are supposed to do it, but x isn't an integer (he bought a non-integer # of eggs?)

Answer 3

I am still getting the wrong answer

Answer 4

good point. it is not an integer is it?

Answer 5

well i can't imagine another way of doing this, so i am stuck

Answer 6

No, and both roots are positive. x = 0.35 or 6.15

Answer 7

Yea I thought this was the only way to do it also o_o FDid you copy it exactly right strawberry? Is there an answer provided and you're trying to figure out the method?

Answer 8

my text gives the answer 13

Answer 9

Ohh wait if you do the equation x(x-8)+(x-2)(x-3)=175 then you'll get a positive integer root. I guess this will make more sense since you're gonna make it equal to 175 pence (rather than 1.75 pounds)

Answer 10

of course (dope slap)

Answer 11

So expand that equation and apply the quadratic formula, one of the roots will be 13 :)

Answer 12

thanks

Answer 13

np =]