Answer/Explain? [MATH]

Test Preparation SAT Preparation
1

<p>Can someone please answer and explain how to get the answer to these two math problems? I would greatly appreciate it! THANKS!</p>

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2

<p>for the first one, begin by squaring both sides to remove the radical. this yields 9/(x-2)=2.
to isolate 9 to construct a form of the equation similar to the answer choices, multiple each side by x-2. This results in 9=2(x-2), choice D.</p>

3

<p>problem 8 tests your basic laws of exponents. more specifically, it tests your knowledge of the fact that two numbers in the same base when divided require one to subtract their exponents. for instance, 2^5/2^3= 2^(5-3), or 2^2.</p>

<p>In this problem, apply that information. x^y-t results from x^y/x^t, which is 2/16, or 1/8, choice C.</p>

4

<p>Thank you!</p>

5

<p>Ali is incorrect.</p>

<p>For the first one, get rid of the sq root by sqauring both sides, yielding 9 = 4(x-2) . E </p>

<p>Second one.</p>

<p>X^y=2 and x^t=16</p>

<p>we want x^y-t , which is the same as x^y/x^t . which is x^2/16 , thus y-x = 2/16 = 1/8 . </p>

<p>C</p>

6

<p>ali153 is wrong about the first problem. 2^2 is not equal to 2. When squaring the equation you have to square both sides, so the real answer should be E.</p>

7

<p>oops sry, right methodology, stupid arithmetic mistake. what can i say, school has been over for months ;)?</p>