Question

4pencils and five pens costs $2.00 Three pencils and four pens cost $1.58 find the cost of a pencil and the cost of a pen

Answer 1

L = lead P = pen

4L + 5P = 2
3L +4P = 1.58

Answer 2

asaila1 use simultaneous equations

Answer 3

L = 2/4 -5P/4

Answer 4

you should get pen = $0.24 and pencil =$0.20

Answer 5

we could multiply the top by 3 and the bottom by -4;)

Answer 6

12L +15P = 6
-12L -16P = -6.32
---------------
0 -P = -.32

P = .32 ???

Answer 7

L = .10?

lets see :)

3(.1) +4(.32) = 1.58
.3 + 1.28 = 1.58 it works

Answer 8

pencil = .10
pen = .32

Answer 9

vit; how you get yours?

Answer 10

let p = pencil and x = pens

so 4p + 5x =$2.00---- 1
and 3p +4x =$1.58---- 2

make p the subject in equation 1:
p = (2-5x)/ 4

sub p into equation 2
3((2-5x)/ 4) + 4x =$1.58
((6-15x)/4)+4x =$1.58
x+6 = $6.24
x= $0.24

sub x back into p
p = (2-5($0.24))/4
p = $0.20

Answer 11

ooops i am so sorry
amistre64 you are correct
i made a slight error in my calculations
in my working out on paper i wrote $1.56
MY APOLOGIES I AM SO SORRY!

Answer 12

virtus; its ok :) happens to me ALLLL the time ;) its always good to have another set of eyes :)

Answer 13

=)