You need to multiply 1 and 5 plus 2. 
and for 5 2/7 it would be 5 times 7 plus 2.
So...
5 2/7= 37/7
1 2/5= 7/5
        
             
        
        
        
Answer:
680
Step-by-step explanation:
Ratio of red to white 4 : 7
Number of white = 280
White + red buttons = x
7x / 11 = 280
7x = 280 * 11
7x = 3080
x = 3080 / 7
x = 440 
Number of red buttons 440 - 280 = 160
Number of red bottons ;
Blue + red buttons = x 
3 : 2 ; blue : red
3 + 2 = 5 ; 
2x / 5 = 160
2x = 160 * 5
2x = 800
x = 800 / 2
x = 400
Number of Blue buttons :
400 - 160 = 240
Total :
White + red + blue
280 + 160 + 240 = 680 buttons 
 
        
             
        
        
        
Answer:
I just need points
Step-by-step explanation:
I just need points
 
        
             
        
        
        
Answer:
190 Degrees Celsius 
Step-by-step explanation:
so first you multiply the 
Rate per minute X Minutes 
15 X 8 = 120 
120 this is the  temperature increase so you add this increase to the initial temperature which was 70 degrees Celsius 
temperature Increase + Initial temperature 
120 + 70 = 190 degrees Celsius