For this case we have the following expression:

We apply distributive property, which by definition establishes that:

So:

Answer:

Answer: 7
Step-by-step explanation: Cross multiply, so 15 times x and 21 times 5. 21 times 5 is 105 then you divide by 15 which gives you 7.
Answer:
45 dandelion × 15 rows= 675