Answer:
am in callege i need points really much
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Step-by-step explanation:
price of 1 pen= $ 2
price of 1 pencil= $1
total money spent= $12
Let the number of pen be a and number of pencil be b.
  2 a + b = 12   ----------------Equation 1
 We have, she bought 3 more pens than pencils
   a - b = 3   ------------------  Equation 2
  Equation 1 +Equation 2,  
    2 a + b +  a - b = 12 + 3
                      3a = 15
                      a = 5
  Substituting in  equation
            5 - b = 3
                b = 2
  Number pencils Ava bought = 2
 
        
             
        
        
        
A.......................... hope it helps
        
             
        
        
        
The measure of the angle formed by 2 chords  that intersect inside the circle is 1/2 the sum of the chords' intercepted arcs. 
m∠RST = (143+33)/2 = 176/2 = 88°