Which of the following conditions must be met for a quadrilateral to be a square? A
It has four right angles.
B
It has four equal sides.
C
It has two sets of parallel sides.

D
It has four equal sides and four right angles

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?