Yahoo Answers is shutting down on 4 May 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

?
Lv 4
? asked in Science & MathematicsMathematics · 9 years ago

Algebra maths questions (2a^7 x 50a^3)^-1/2 & (3x^4 x 9x^5)^-1/3?

1. (2a^7 x 50a^3)^-1/2

2. (3x^4 x 9x^5)^-1/3

Please solve and show full working.

I don't get how to do these types especially when it comes to simplifying I get the wrong answer.

Also please explain to me how to work them out.

For this question (2a^7 x 50a^3)^-1/2 the answer is 1/3x^3 but I got 1/9x^3

Please explain to me why it is a 3 not 9

Update:

1.012^t = 3

What does t equal and how do you work it out?

I normally just guess but whats the actual way？

2 Answers

Relevance
  • Anonymous
    9 years ago
    Favourite answer

    Haha, last minute study, I'm clueless as you are mate

    Source(s): NCEA Level 2
  • Anonymous
    5 years ago

    Subtract both sides by 30 to obtain: x² + x - 30 = 0 Factor the polynomial, which gives: (x - 5)(x + 6) = 0 Set each by zero and solve for x. This gives: x - 5 = 0 and x + 6 = 0 Therefore, you have: x = {5, -6} I hope this helps!

Still have questions? Get answers by asking now.