Answer:

Step-by-step explanation:
step 1
In the isosceles right triangle PQT
PQ=PT ----> because is an isosceles triangle
Applying the Pythagoras Theorem
we have


substitute the values



step 2
In the square QRST

step 3
In the right triangle RSU
Applying the Pythagoras Theorem

we have


substitute the values and solve for SU





 
        
             
        
        
        
Answer:
See below ~
Step-by-step explanation:
<h3>What number represents the slope?</h3>
The slope refers to the rate of change of the equation.
Here, the slope is 1473 as that is the value that is multiplied on increasing the number of classes.
It represents the price per class.
<h3>What number represents the y-intercept?</h3>
The y-intercept refers to where the line intersects the y-axis.
Here, the y-intercept is 5495.
It represents the one time fee for room and board.
 
        
             
        
        
        
Answer: She bought 68 books. 
Step-by-step explanation:
Subtract 31 from 99 to find the difference! The difference tells us how many books she bought at the yard sale. 
 
        
             
        
        
        
Answer:
 x-30y=100 and 10y=x-20
Step-by-step explanation: