2021 STAAR Most Missed

The owner of a bookstore buys used books from customers for $1.50 each. The owner then resells the used books for 400% of the amount he paid for them. What is the price of a used book in this bookstore?

A student will spin two spinners in an experiment. The tree diagram shows all possible outcomes of the experiment. Which sample space is described by this tree diagram?

• {(1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), (3, 3), (1, R), (1, T), (1, Z), (2, R), G (2, T), (2, Z), (3, R), (3, T), (3, Z)}

• {(1, 2, 3), (R, T, Z)}

• {(1, R, T, Z), (2, R, T, Z), (3, R, T, Z)}

• {(1, R), (1, T), (1, Z), (2, R), (2, T), (2, Z), (3, R), (3, T), (3, Z)}

The angle measures of a triangle are shown in the diagram. What is the value of x?

• 45

• 90

• 30

• 35

Natasha has a job putting letters in envelopes to be mailed. In 1 hour she put 42 letters in envelopes. Which equation best represents y, the total number of letters Natasha puts in envelopes in x hours if she continues at this rate?

The dot plots show the numbers of apples picked by members of two different tour groups at an orchard. Which statement correctly compares these two data sets?

• The median of the data is the same for both data sets.

• The mode of the data is the same for both data sets.

• The range of the data is the same for both data sets.

• The distribution of the data is symmetrical for both data sets.

Which proportion can be used to calculate the length of side LM in centimeters?

The dimensions of a rectangular pyramid are shown. What is the volume of this rectangular pyramid in cubic feet?

Mathematical Equivalence

ON

Which equation best represents the relationship between x and y in the graph?

A container in the shape of a triangular prism is used to hold a slice of pizza. The dimensions of the container are shown in the diagram. What is the volume of the container in cubic inches?