Paul spend 22.4 on student discount card.
        
             
        
        
        
Answer:
Rise/Run = y/x
Step-by-step explanation:
On a number line the X-axis is on the bottom, and the Y-axis is on the Top.
 
        
             
        
        
        
Complete question :
Cheddar Cheese
$3/lb
Swiss Cheese
$5/lb
Keisha is catering a luncheon. She has $30 to spend on a mixture of Cheddar cheese and Swiss cheese. How many pounds of cheese can Keisha get if she buys only Cheddar cheese? Only Swiss cheese? A mixture of both cheeses?
What linear equation in standard form can she use to model the situation?
Answer:
10 lbs of cheddar cheese 
6 lbs of Swiss cheese 
$3a + $5b = $30
Step-by-step explanation:
Given that :
Cheddar cheese = $3/lb
Swiss cheese = $5/lb
Total amount budgeted for cheese = $30
How many pounds of cheese can Keisha get if she buys only Cheddar cheese? 
Pounds of cheedar cheese obtainable with $30
Total budget / cost per pound of cheddar cheese 
$30 / 3 = 10 pounds of cheedar cheese
Only Swiss cheese? 
Pounds of cheedar cheese obtainable with $30
Total budget / cost per pound of Swiss cheese 
$30 / 5 = 6 pounds of Swiss cheese
A mixture of both cheeses?
What linear equation in standard form can she use to model the situation?
Let amount of cheddar cheese she can get = a 
Let amount of Swiss cheese she can get = b
Hence, 
(Cost per pound of cheddar cheese * number of pounds of cheddar) + (Cost per pound of Swiss cheese * number of pounds of Swiss cheese) = total budgeted amount 
(3 * a) + (5 * b) = $30
$3a + $5b = $30
 
        
             
        
        
        
So just add 1/8 and 2/8. add 1 plus 2 and the denominator (bottom number) stays the same so you get 3/8 then subtract 8/8 minus 3/8 so just 8 minus 3 is 5 and the denominator stays the same so you end up with 5/8 so 5/8 of the book remains unread