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1.a) -2*(-7)=14

b) -3*10= -30

2. a) 4a - 5a = -1a

b) 3x + 7x -2x = 8x

3. a) -9

b) 10 5/8

4. a) -0.04

b)-6.25

5. - 3/5xy

the answer is c.

step-by-step explanation:

pakistan's principal natural resources are arable land and water. about 25% of pakistan's agriculture accounts for about 21% [1] of gdp and employs about 43% of the labour force. in pakistan, the most agricultural province is punjab where wheat and cotton are the most grown.