(15 points) geometry assignment/ any help would be appreciated

Find the quotient. 50a2 – 98b2 -5a +7b

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?

Determine the standard form of the equation of the line that passes through (-2,0) and (8,-5)