The expression that calculates the total amount spent can be simplified by factoring out the common factor. The two items she bought cost the same amount ($20 each), so you can sum the number of items first and then multiply by the price:
The expression is:
20 ⋅ (5 + 3)
This simplifies to the total amount spent by first finding the total number of items (5 plants + 3 chairs = 8 items) and then multiplying by the cost per item ($20).
The correct response from the options given is:
20 ⋅ (5 + 3).