Algebraic Expressions II - JSS2 Mathematics Past Questions and Answers - page 2

Using the formula:

Time=Distance/Speed

Time=100/𝑥

The formula for the perimeter 

𝑃 of a rectangle is:

𝑃=2(Length+Width)

Substitute the given values:

𝑃=2((3𝑤+4)+𝑤)

=2(3𝑤+4+𝑤)

=2(4𝑤+4)

=8𝑤+8