Answer:
9
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
868 m³
Step-by-step explanation:
Volume = Difference of cones
V = ⅓(pi×r²h)
Volume of cone with base Circle O: 
h = 8.2+8.2 = 16.4 m
V1 = ⅓(pi×7.6²×16.4)
V1 = 991.97
Volume of cone with base Circle A: 
V2 = ⅓(pi×3.8²× 8.2)
V2 = 124 m³
Volume = V1 - V2 
991.97 - 124 = 868 m³
 
        
             
        
        
        
The triangle of height 5 units and base 7 units will be as follows:
 
        
        
        
Alexis worked for 59 hours, Becca worked for 74 hours and Cindy worked for 152 hours.
Step-by-step explanation:
Given, 
Total hours worked by three of them = 285 hours 
Let, 
x represent the hours of Alexis.
y represent the hours of Becca.
z represent the hours of Cindy. 
According to given statement;
x+y+z=285    Eqn 1
Alexis worked 15 hours less than Becca.
x = y-15         Eqn 2
z = 2y+4        Eqn 3
Putting value of x and z from Eqn 2 and 3 in Eqn 1

Dividing both sides by 4

Putting y=74 in Eqn 2

Putting y=74 in Eqn 3

Alexis worked for 59 hours, Becca worked for 74 hours and Cindy worked for 152 hours.
Keywords: linear equation, division
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