The expression that can be used in order to express the amount of money that Morgan has after spending s will be,
<em> x = 150 - s</em>
where x is a variable that we can use in order to denote the amount she will have left, 150 is the original amount of money as stated in the problem and s is the amount spent.
For the evaluation, we simply have to substitute the given values in place of s and calculate for the value of x.
(1) s = $27.13 x = 150 - 27.13 <em> x = $122.87</em>
(2) s = $55.14 x = 150 - 55.14 <em>x = $94.86</em>
Step-by-step explanation: you divide the cost by how many of each. In this case $90 and 10 flowers. So you divide 90 by 10. This gives you 9. So the answer is $9 per flower.