Megan drove from her house to work at an average speed of 45 miles per hour. the drive took her 20 minutes. if the drive home took her 30 minutes and she used the same route in reverse, what was her average speed going home?

Speed = distance/time  

distance = 45 miles  

time = 30 minutes = 1/2 hours  

therefore speed = 90 mph  

Question 2  

distance = speed x time  

speed = 7.5  

time = 15 minutes = 1/4 hours  

therefore distance = 15/4 miles  

time = distance/speed  

distance = 15/4 miles  

speed = 8  

time = (15/4)/8 = 15/32 hours

Step-by-step explanation:

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.