Answer:
70
Step-by-step explanation: the type of angle it is 
 
        
                    
             
        
        
        
The midpoint of (x1,y1) and (x2,y2) is 

just average them
(4,1) and (-2,4)
the midpoint is  

(1,-1.5)
 
        
        
        
Answer:
188
Step-by-step explanation:
SR and ST are equal in length so the arc SR and arc ST also have same measurement
since the perimeter of the circle is equal to 360 and arc RT is given as 64
x = (360 - 64) / 2
x = 188
 
        
             
        
        
        
Answer:
The slope is -2
Explanation:
I choose two points on the graph (0,-2) and (-1,0) and put it into the slope form using two coordinate pairs which is y-y/x-x and got -2/1 which simplifies down to -2
        
             
        
        
        
10 cheese pizzas
use  simple ratio, 3:2 (3 pepperoni for every 2 cheese)
to make the ratio bigger, we substitute the "3" pepperoni for "15" pepperoni. then take the new amount, 15/3 original, you get 5. then multiply the 2 original cheese pizzas by that 5, and you get 10 cheese pizza's. 
hope that helps