If a train travels 500 miles in 4 hours, what is the speed

Find the value of x that will make l ll m

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.