A car travels 30 1.5 miles in 2.3 of an hour. What is the average speed, in miles per hour, of the car?

The answer would be D. 38.7 miles per hour. To figure this out you must replace the d with 41 and the t with 2.3 so you get an equation that looks like this, 41=r-2.3. With this you can easily subtract 41-2.3 and you get 38.7 as the r. ;)

Step-by-step explanation:

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step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.