How do I solve -5 1/4 - (-7 1/2) step by step

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?

Will mark brainlist what is the slope of the line passing through the points (-2, -8) and (-3,-9)? -7/5-5/71-1

Can someone me with my math problems i have a bunch. i will give brainliest and lots of pleeeaaasssee