Finding the "single variable" information

The length of a rectangle is twice the width. Which dimension is the single variable ?

• length

• width

• perimeter

• area

The second of two numbers if 4 times the first. Their sum is 50. Which number is the single variable ?

• first

• second

• third

• sum

The sum of two numbers is 50. The first is 5 less than 4 times the second. Which number is the single variable ?

• first

• second

• third

• sum

The greater of two numbers is 3 more than the smaller. Which number is the single variable ?

• greater

• smaller

• middle

• the sum

The second of two numbers is 5 times the first. The sum is 180. Which number is the single variable ?

• second

• third

• first

• the sum

The length of a rectangle is twice the width. Define the variables in terms of 'x'

• length= x, width = 2x

• length= 2x, width = x

• length= x, width = ¹/₂ x

• none of the above

The second of two numbers if 4 times the first. Define the variables in terms of 'x'

• first= x, second = 4x

• first= 4x, second = x

• first= ¹/2 x, second = 2x

The sum of two numbers is 50. The first is 5 less than 4 times the second.

Define the variables in terms of 'x'

• first = x, second = 4x - 5

• first = 4x, second = x - 5

• first = 4x - 5, second = x

The greater of two numbers is 3 more than the smaller.

Define the variables in terms of 'x'

• greater = x, smaller = 3+x

• greater = 3+ x, smaller = x

• greater = x, smaller = 3 - x

• greater = 3x, smaller = x

The second of two numbers is 5 times the first. The sum is 180.

Define the variables in terms of 'x'

• x = the first number, 5+x = the second number

• x = the first number, 5x = the second number

• 5x = the first number, x = the second number

• 5 + x = the first number, x = the second number