Question

Sara has $2$ dogs. One dog had a litter of $5x$ puppies last week. Her other dog just had a litter of $7y$ puppies yesterday. How many dogs does Sara have now?

• A. $12x$
• B. $2+5x+7y$
• C. $5x+7y$
• D. None of the above

Answer 1

The correct option is B $2+5x+7y$

$\text{Total dogs that Sara has}$
$=\text{Initial dogs + total puppies}$

$⟹\text{Total dogs that Sara has}$
$=2+(5x+7y)$

$\therefore \text{Total dogs that Sara has}$
$=2+5x+7y$

[All terms are unlike, they cannot be combined]