Which statement about sound is true because it is a mechanical wave?

It can travel through the vacuum of space.

It must travel through a medium.

o

It can travel only through air.

o It cannot travel through a medium.

At the museum, there were 4,050 students in attendance from a total of 15 school districts. What was the average attendance from each school district.

What is the relationship between the two variables represented in the table? Height of People (cm) Shoe Size 170 8.5 172 9 174 9.

Solve each system of equations by graphing Y=3x+4 and y=-x-4

Can you solve for * / 4+7=5

What is the best estimate 1/2% of 385

Write a ratio for the following description: Kaleel made three times as many baskets as john during basketball practice.

If you were on the moon, your weight would only be 0.17 of your weight on Earth. If you weigh 195.75 pounds on Earth, how much would you weigh on the moon?

Find the center, vertices, and foci of the ellipse with equation x^2/100+y^2/64 = 1.

The first person has $15 and saves $1.50 each day. The second person has $55 and spends $4.50 each day. In about how many days will they have the same amount of money? a 7 days b 15 days c 21 days d 12 days

Ten students participated in a raffle to win a computer. There are two new computers being given away and two students will be chosen at random one at a time without replacement. How many possible ways are there to choose the two students?