Answer:
16
Step-by-step explanation:
3x - 4 =  (10x - 72)
(10x - 72)
⇔ 6x - 8 = 10x - 72
⇔ 4x = 64
⇔ x = 16
 
        
             
        
        
        
Answer:
Question 2
Step-by-step explanation:
2) The time when she woke up was -  3° C
During nature walk, temperature got 3° C warmer than when she woke up.
So, temperature during nature walk = - 3 + 3 = 0° C
 
        
             
        
        
        
Growth because “appreciate” 6% per year
Initial amount = 130000
Growth/decay rate: 0.06
130000(1+0.06)^x
Hope this helps!
        
             
        
        
        
6 songs
The way to find this answer is to divide 18 by 3, which is six, which means that after every six songs a commercial is played. 
Hope this was helpful and that I explained it correctly. 
        
             
        
        
        
Volume of the cone:
V = 3.14 x 3^2 x 9/3 = 84.78
Volume of half sphere on top of cone:
V = (4/3 x 3.14 x 3^3 )/2 = 56.52
Total volume = 56.52 + 84.78 = 141.3 cm^3