Using substitution to evaluate expressions

Front

What does 'decreased by' mean in algebraic terms?

Back

'Decreased by' indicates subtraction. For example, 'h decreased by 13' translates to h - 13.

Front

How do you express '12 more than a number' algebraically?

Back

It is expressed as x + 12.

Front

Evaluate the expression -2x when x = 10.

Back

-20

Front

What is the algebraic expression for 'the sum of m and k'?

Back

It is m + k.

Front

Evaluate the expression 4y when y = 3.

Back

12

Front

What does 'increased by' mean in algebraic terms?

Back

'Increased by' indicates addition. For example, 'x increased by 5' translates to x + 5.

Front

How do you express 'the product of a number and 7' algebraically?

Back

It is expressed as 7x.

Front

Evaluate the expression 3a + 2 when a = 4.

Back

14

Front

What does 'the difference of two numbers' mean in algebra?

Back

'The difference of two numbers' indicates subtraction. For example, 'the difference of a and b' translates to a - b.

Front

How do you express 'twice a number' algebraically?

Back

It is expressed as 2x.