Final answer:
The number of bricks used for the cinder block wall is 10x^2, where 'x' is the number that represents one dimension of the blocks.
Step-by-step explanation:
The question asks about the number of bricks used in constructing a cinder block wall with dimensions given in multiples of x. The wall is 2x blocks wide and 5x blocks tall. To determine the number of bricks, we multiply the width (2x blocks) by the height (5x blocks), yielding the total number of blocks in the wall. The calculation is as follows:
Number of bricks = width × height
= 2x × 5x
= 10x2
Therefore, the number of bricks used in Mason's construction is 10x2, where 'x' is the value representing one dimension of the blocks.