Hi 
1 mile = 5280 feet  
at  90 mile per hour, you have  5280 *90  = 475 200 feets  
an hour is  60*60 = 3600 second  
so in 1 second the train travel  :  475 200 /3600 = 4752 /36 = 132 feets 
so in 10 seconds  :  132*10 = 1320 feets.
 
        
             
        
        
        
Answer:
y = 0.5x + 50.95
Step-by-step explanation:
Given y is total cost while x is total miles
Slope: m = (y2-y1)/(x2-x1)
m = (75.95-65.95)/(50-30) = 10/20 = 0.5
y = mx + b
y = 0.5x + b
75.95 = 0.5(50) + b
b = 50.95
Slope intercept form: y = 0.5x + 50.95
 
        
             
        
        
        
Answer:
Choice A
Step-by-step explanation:
In each case, each equation has an equation of a line in y = mx + b form equaling another equation of a line in y = mx + b form. If the two sides are equal, it is the same equation, there are infinitely many solutions. If the sides are different, then if the slopes are different, the lines intersect at one point, and there is exactly 1 solution. If the slopes are equal, the lines are parallel, and there is no solution.
(Choice A) -10x-10=-10x-10
In Choice A, both sides of the equation are equal, so there are infinitely many solutions.
(Choice B) 10x-10=-10x+10
(Choice C) 10x-10=-10x-10
(Choice D) -10x-10=-10x+10
In choices B through D, the two sides are not equal, so there is either 1 solution (B and C since they have different slopes) or no solution (D since the slopes are equal).
 
        
             
        
        
        
Answer:
9 a²+24a+16
Step-by-step explanation:
hope it's helpful to you ☺️