Check all that apply.

Question

Rafael writes an expression to represent “a number, n, decreased by thirty-one.” Then he evaluates that expression if . Which statements are true about the expression and its evaluation? Check all that apply.

Comments

The correct expression is .

This is a subtraction expression.

This is an addition expression.

To evaluate, substitute 29 for the variable in the expression.

To evaluate, substitute 31 for the variable in the equation.

To evaluate the expression, add 31 to 29.

The correct expression is .

To evaluate the expression, subtract 31 from 29.

Answer 1

1. F
2. T
3. F
4. T
5. F
6. F
7. T
8. T 29-31=-2

Comments

It says check all that apply (not just one). I used true (T) or false (F) where T represents a check. F means I didn't check.

In 8 I added extra information for the user to show the result of subtraction (in case she needed it at the time).

Answer 2

Rafael writes an expression to represent “a number, n, decreased by thirty-one.” Then he evaluates that expression if . Which statements are true about the expression and its evaluation? Check all that apply.

The correct expression is .

This is a subtraction expression.

This is an addition expression.

To evaluate, substitute 29 for the variable in the expression.

To evaluate, substitute 31 for the variable in the equation.

To evaluate the expression, add 31 to 29.

The correct expression is .

To evaluate the expression, subtract 31 from 29.