Let's solve each part of the question step by step:
How much money does Dan have now?
Dan initially has 20 x pesos. His sister gave him 5 x more pesos. To find out how much money Dan has now, we add the amount he had initially to the amount his sister gave him:
20 x + 5 x = 25 x
So, Dan now has 25 x pesos.
What is the total length of both gardens?
The first garden has a length of 7 a meters, and the second garden has a length of 2 a meters. To find the total length of the gardens, add the two lengths together:
7 a + 2 a = 9 a
Therefore, the total length of both gardens is 9 a meters.
How many mangoes did he sell in all?
The vendor sold 6 y mangoes in the morning and 4 y in the afternoon. To find the total number of mangoes sold, add the number of mangoes sold in the morning to the number sold in the afternoon:
6 y + 4 y = 10 y
Thus, the vendor sold a total of 10 y mangoes.