Sarah drives her car 133 miles in 285 minutes. What is her average speed in miles per hour?

What is the value of x in the diagram below?

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12