The sum of a number and 5 times the number is 18.find the number

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?

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?

32a³b² 8ab² simplify the following expression.