Mrs. Newton wants to know what color t-shirt her homeroom would like to wear for Bronco Day. She tells students if they would like to choose a color, they can go to
her eclass page and take the survey. Is her method of sampling biased or
representative and why?
Biased, it is a voluntary sample
Biased, it is a simple redom sample
Representative, it is a voluntary sample
Representative, it is a simple random sample

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∣∣

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap