Which expression is equivalent to (x^-4y/x^-9y^5) ^-2? Assume x ≠ 0, y ≠ 0

A y^8/x^10

B x^5/y^7

C x^5/y^4

D x/y^7

Which expression is equivalent to 28p^9q^-5/12p^-6q^7 Assume p ≠ 0, q ≠ 0

A 2/p^15q^12

B 7p15/3q12

C 2q^12/p^15

D 7p^15q^12/3

Which expression is equivalent to (5ab) ^3/30a^-6b^-7? Assume a ≠ 0, b ≠ 0

A a^7b^10/6

B 125a^18b^21/30

C 25a^3b^4/6

D 25a^9b^10/6

Question

Mathematics

Randy Sanford

12 March, 13:43

Which expression is equivalent to (x^-4y/x^-9y^5) ^-2? Assume x ≠ 0, y ≠ 0

A y^8/x^10

B x^5/y^7

C x^5/y^4

D x/y^7

Which expression is equivalent to 28p^9q^-5/12p^-6q^7 Assume p ≠ 0, q ≠ 0

A 2/p^15q^12

B 7p15/3q12

C 2q^12/p^15

D 7p^15q^12/3

Which expression is equivalent to (5ab) ^3/30a^-6b^-7? Assume a ≠ 0, b ≠ 0

A a^7b^10/6

B 125a^18b^21/30

C 25a^3b^4/6

D 25a^9b^10/6

+3

Answers (1)

Know the Answer?

Lea Hicks · Answer 1

In solving these, remember that your goal is to get rid of negative exponents and to simplify coefficients. Factor coefficients to make the process easier. When you deal with the variables, get rid of negative exponents before you combine the like variables. This will simplify the problems. The answers are C, B and D.