which is not a major source of income for the mexican economy?

tourism

agriculture

petroleum extraction

technology

Suggest two reasons why irrigation is important for human development of the desert (4 marks)

Which phrase describes the time it takes for a planet to make a complete rotation

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 6x + 5y = 2 4x + 2y = 8 a) subtract 2 times the second equation from 3 times the first equation b) subtract 3 times the second equation from 2 times the first equation c) subtract 5 times the second equation from 2 times the first equation d) subtract 2 times the second equation from 5 times the first equation