NSCAS Mathematics Assessment 3

Question 1

Which inequality represents 'a number x is at least 5'?

Accepted Answer

x ≥ 5

Answer

'At least 5' means x can equal 5 or be greater, which is written as x ≥ 5.

Question 2

A triangle has angles measuring 45°, 90°, and what third angle?

Accepted Answer

45°

Answer

The sum of interior angles of a triangle is 180°, so 180° − 45° − 90° = 45°.

Question 3

Which expression is equal to 6(x + 4)?

Accepted Answer

6x + 24

Answer

Using the distributive property: 6 × x + 6 × 4 = 6x + 24.

Question 4

A table shows the number of books read per month: 3, 5, 4, 6, 7. What is the mean number of books read?

Accepted Answer

5

Answer

Mean = (3 + 5 + 4 + 6 + 7) ÷ 5 = 25 ÷ 5 = 5.

Question 5

On a coordinate grid, point A is at (3, -2). If the point is reflected over the x-axis, what are the new coordinates?

Accepted Answer

(3, 2)

Answer

Reflecting over the x-axis changes the sign of the y-coordinate: (3, -2) becomes (3, 2).

(NSCAS) Nebraska Student-Centered Assessment System Practice Test