Here is one way to solve this
problem using our rate formula.
X dollars x 5 pounds/1 dollar
= 9 pounds
To solve for X, you multiply both sides by
the inverse or 1 dollar/5 pounds.
- X dollars = 9 pounds x 1 dollar / 5 pounds
- X dollars = 9 x 1 dollar / 5 (Notice
that the pounds 'divide out' each other.)
- X dollars = 9 dollars/5
- X dollars = 1.80 dollars or $1.80.
Therefore our answer to this question is letter B,
$1.80. |
