Mary collects dolls. she has 4 dolls more then her friend penney. mary says if she tripled the number of dolls she has, she would have 27 dolls. how many dolls does penney have?

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∣∣

What is the slope of the line shown below?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.