" Find "a^(-2)" ,if "a=((-5)/(9))^(-3)-:((21)/(25))^(0)

Find a^(-2),quad if quad a=((-5)/(9))^(-5)-:((21)/(25))^(0)

The value of (((3)/(5))^(3)-((2)/(5))^(3))/(((3)/(5))^(2)-((2)/(5))^(2)) is (1)/(5)(b)(19)/(25) (c) (21)/(25)(d)1

Find : (5/9)^(-2) times ( 9/5 )^(-3) times ( 3/5 )^0

Evaluate : 7^(0)xx(25)^(-(3)/(2))-5^(-3)

What is the value of (3)/(7) div (9)/(21) +2-(4)/(3)+(1)/(2)" of "(12)/(5) xx (25)/(18) div (5)/(9) ?

Find the sum : (i) 5/4 + ((-11)/(4)) , (ii) 5/3 + 3/5 , (iii) (-9)/(10) + 22/15 (iv) (-3)/(-11) + 5/9 , (v) (-8)/(19) + ((-2))/(57) , (vi) (-2)/(3) + 0 (vii) -2'1/3 + 4'3/5

Evaluate: (11)/(21)+((-9)/(21))

Evaluate: ((2)/(3)xx(9)/(8))-((5)/(44)xx(-11)/(15))-((35)/(28)div(21)/(-14))

Find A, if 2A+3 [(5,0),(3,1)]=5[(1,9),(0,-2)] .