A dance student wants to know the favorite type of dance class for students at The Dance Academy. She surveys each student in her ballet class. In which way could the results of her survey be most improved? She could sample an equal number of students in each type of dance class. She could sample a proportional number of students in each type of dance class. She could sample one student in each type of dance class. She could sample one teacher from each type of dance class.

One hamster weighs 300 g less than halfthe weight of a second. If their combined
weight is 1950 g, how much does each
hamster weigh?

In what type of situation is it easy to compare two numbers written in scientific notation?Give an answer in a complete sentence.

On Friday 3/10 of the students were wearing white shorts and 5/12 were wearing blue shirts . What fraction of kids were wearing either a white shirt or a blue shirt.A. 2/2
B. 4/11
C. 7/60
D. 43/60

Question 2

Terry sewed a zipper that was 25.4 centimeters long into a jacket. Which mixed number shows another way to write 25.4

A. 25 1/25
B. 25 4/25
C. 25 1/4
D. 25 2/5

3 question

Ms. Kim cut a loaf of bread into 10 pieces. After making sandwiches she has 2 slices left. What is the fraction of the loaf of bread did she use to make sandwiches?

A. 1/5
B. 2/5
C. 3/5
D.4/5

A train traveled 210 miles in 3.5 hours to its first stop. It then continued on traveling another 130 miles in 2.5 hours. What was the average speed of the train for the entire journey

The wings of a ruby-throated hummingbird beat an average of 52 times per second. About how many times will it's wings beat in one minute?

X + y = -9
5x - 2y = 32