Question

Q.29.) Subtract 6xy from -12xy? *
A.) 6xy
B.) 18xy
C.) -18xy
D.) None of these
Q.30.) Add 3mn, -5mn, 8mn, -4mn? *
A.) -2mn
B.) 2mn
C.) 20mn
D.) -20mn
Q.31.) Simplify in exponential form (25)⁴ ÷ 5³ ? *
A.) 5²
B.) 5³
C.) 5⁴
D.) 5⁵​

Answer 1

Answer:

i) c

ii) b

iii) d

Step-by-step explanation:

i) -12xy-6xy = -18 xy

ii) 3mn+8mn-5mn-4mn=2mn

iii) (25)⁴ ÷ 5³ =( 5²)⁴÷5³=5^5

Answer 2

Answer:

Q29. C) -18xy

Q30. B) 2mn

Q31. D) 5⁵

Step-by-step explanation:

Q29. Subtract 6xy from -12xy?

Answer:

-12xy - 6xy

= -18xy

ΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞ

Q30. Add 3mn, -5mn, 8mn, -4mn?

Answer:

3mn + (-5mn) + 8mn + (-4mn)

= 3mn - 5mn + 8mn - 4mn

= 2mn

ΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞΞ

Q31. Simplify in exponential form (25)⁴ ÷ 5³?

Answer:

(25)⁴ ÷ 5³

= (5²)⁴ ÷ 5³

= 5⁸ ÷ 5³

= 5⁽⁸⁻³⁾

= 5⁵