Answer:
The attached image shows the equation graphed on a graph. From there you can plot the points.
We have the formula: (spending : sum of spending) . 100 = ......
first multiply the outside numbers by both the numbers in the ()
10xg=10g 10x5=50 2xg=2g 2x9=18
then combine like terms
10g+50=2g+18
8g=32
then divide
g=4
ANSWER
D) 10
EXPLANATION
We want to solve the radical equation,

Square both sides,

Expand brackets on right hand side,

Rewrite in general quadratic equation form,

Factor to obtain,

Apply the zero product principle to get,

We put n=2 into the equation to get,


This statement is false, hence 2 is an extraneous solution
We put n=10, to get



This is true, hence the only solution is
If you would like to find the raft's selling price, you can calculate this using the following steps:
100% + 55% = 155%
155% of $110 = 155% * 110 = 155/100 * 110 = $170.5
The correct result would be $170.5.