Answer:
r=-6
Step-by-step explanation:

Answer:
The valedictorian is the person who has the highest academic achievements in their graduating class not to mention they get to deliver the valedictory speech.
Step-by-step explanation:
First, let's figure out how many cups of cheese we need for one dozen people.
There are 12 people in one dozen.
<u>3 cups of cheese </u> = <u>x cups of cheese</u>
6 people 12 people
<u>
</u>
that means we will need 6 cups of cheese for 12 people, or one dozen.
However, we want to make nachos for two dozen people.
6 cups of cheese for one dozen x 2 dozen = 12 cups of cheese
<em>You need 12 cups of cheese to make nachos for two dozen people. </em>
The given formula 
Solve for y means we have to make y alone
\\
Add -10 on both sides, we get

As there is multiplication sign between r and y so to solve for y, divide both side by r
