Show how to solve the problem 378 x 6 using place value with regrouping

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Which math sentence can be used to determine if the triangle is a right triangle?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.