SOLUTION: A compass and ruller costs for $4.00 together. The compass is .90 more than the ruler. How much does the compass costs?

Question 178470: A compass and ruller costs for $4.00 together. The compass is .90 more than the ruler. How much does the compass costs?
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
let the compass and the ruler cost be c and r, respectively
:
c+r=4......eq 1
c=r+.9.....eq 2
:
take c's value of r+.9 from eq 2 and plug it into eq 1
:
r+.9+r=4
:
2r=3.10
:
$costs of rulers
:
from eq 2:c=r+.9$cost of compasses
:
1.55+2.45=$4.00

RELATED QUESTIONS
1. How many ways can you make change for $50 bill using $5, $10 and $20 bills? 2. A... (answered by checkley77)

i need a little help with this problem. A compass=4, a ruler=4 The compass is 90 more (answered by Alan3354)

a compass and ruler together cost $4. the compass costs 0.90 more than the ruler. how... (answered by solver91311)

I do not know where to start with this problem: A compass and a ruler together cost... (answered by scott8148,dragonwalker)

Ben bought a pad of paper, a pencil, an eraser, and a compass for $1.80. The compass... (answered by Cintchr,Paul)

How might a loop of wire carrying a current be used as a compass? Can it be used as a... (answered by math_tutor2020,mananth)

I need prealgebra tutor for the compass placement test... (answered by lenny460)

I'm studying for a compass test and this is an example and I can't remember how to do... (answered by scott8148)

* Use a ruler to draw a segment with the given length. 1 13/16 inches * use a... (answered by solver91311)