Question 4 of 18 in Algebra 2

Algebra 2

3 marks · Easy

The formula for the perimeter of a rectangle is .

(a)

Substitute and into the formula. Work out the value of .

[2 marks]

(b)

If and , rearrange the formula to find the value of .

[1 mark]

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(a) 20

(b) 5

Show mark scheme and worked solution

Marking points

M1 (a) · 1 mark · Substitutes values correctly into .

A1 (a) · 1 mark · Arrives at the correct value .

M2 (b) · 1 mark · Rearranges and solves for .

Worked solution

a) Substitute , into :

b) If , , solve for :

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