i-Ready Diagnostic Test Diagnostic Algebra and Algebraic Thinking 2

Question 1

A store sells notebooks for $3 each. Which equation represents the total cost (C) for n notebooks?

Accepted Answer

C = 3n

Answer

Multiplying the price per notebook by the number of notebooks gives total cost: C = 3n.

Question 2

What is the value of x in the equation 4x − 6 = 18?

Accepted Answer

6

Answer

Adding 6 to both sides gives 4x = 24, then dividing by 4 gives x = 6.

Question 3

Which expression is equivalent to 5(x + 4)?

Accepted Answer

5x + 20

Answer

Distributing 5 to each term inside the parentheses gives 5x + 20.

Question 4

The rule for a pattern is 'multiply by 3 and subtract 1.' If the input is 5, what is the output?

Accepted Answer

14

Answer

5 × 3 = 15, then 15 − 1 = 14.

Question 5

Which inequality represents 'a number y is at most 12'?

Accepted Answer

y ≤ 12

Answer

'At most 12' means y can equal 12 or be less, so y ≤ 12.

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