Two trains traveling from different point one at 38 mph the other at 42 mph going 400 miles when will the cross each other

Two lines parallel to the same plane are parallel to eachother

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Look at the example below which shows how the product property of radicals is used to simplify a radical. use the product property of radicals to simplify the following radical.