Which of the following is an improper fraction?

1. $\dfrac{3}{4}$

2. $\dfrac{5}{8}$

3. $\dfrac{9}{7}$

4. $\dfrac{1}{3}$

What is the place value of 7 in the number 45.672?

1. 7 tenths

2. 7 hundredths

3. 7 ones

4. 7 thousandths

Which of the following is a variable?

1. 5

2. x

3. 3 + 4

4. 8

How many end points does a ray have?

1. 0

2. 1

3. 2

4. Infinite