13 + 2x = 3
subtract 13 from both sides of the equation
2x = -10
divide by 2 on both sides 
x = -5
        
                    
             
        
        
        
The answer is minus 666 that’s the answer byee
        
             
        
        
        
Answer:
6
Step-by-step explanation:
 
        
             
        
        
        
Answer:
0.311 miles
Step-by-step explanation:
Convert 16 seconds to hours : 
16 /60×60 
= 16÷3600 
= .004444hrs
Distance = Speed × time
 = 70 × 0.00444444
 = 0.311 miles
 
        
                    
             
        
        
        
Answer:
3
Step-by-step explanation:
Intersections on the x axis occur when y = 0. f(x) is another term for y, so set f(x) equal to zero and solve for the two possible x's. 
0 = x^2 - 3x - 40
0 = (x-8)(x+5)
By solving for x, you get 8 and -5. 8 and -5 added together will equal 3.