Highlight four benefit of volcanic activities in man

1. lava cooled over several years it forms fertile soil good for growing of some crops like cotton

2. volcanic features are good tourists attractions brings in foreign currency

3. precious stones like diamond and copper are found at volacanic sites

4. water heated at volcanic sites supply homes and industries saving alot of money ethermal energy

goo

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4