Question

A garden has $r$ parallel rows of plants, with $5$ plants in each row. If $x$ plants are added to each row, how many plants will then be in the garden, in terms of $r$ and $x$ ?

• A. $5rx$
• B. $5r+x$
• C. $5r+rx$
• D. $5r+5rx$
• E. $r+5+x$

Answer 1

The correct option is C $5r+rx$

Given that there are $r$ parallel rows and $5$ plants in each row.

Now $x$ plants are added in each row. So, number of plants in each row will be $5+x$.

Therefore total number of plants in garden is equal to the product of the number of plants in each row and number of rows.

$(5+x)\left(r\right)=5r+xr$.