Cracking The SAT Premium

This doesn’t match any of the answers exactly, but it looks a lot like (D). To make it match exactly,

multiply the fractional part by , which won’t change the value of the fraction, to get

Tw  =   

Then, just swap the positions of the two parts of the denominator to get (D).

Solving Radical Equations

Radical equations are just what the name suggests: an equation with a radical ( ) in it. Not to worry,

just remember to get rid of the radical first by raising both sides to that power.

Here’s an example:

7.If    7   -   24  =11,    what    is  the value   of  x   ?

A)

B)

C) 5

D) 25

Here’s How to Crack It

Start by adding 24 to both sides to get 7 = 35. Now, divide both sides by 7 to find that = 5. Finally,
square both sides to find that x = 25, which is (D).

Solving Rational Equations

Since you are not always allowed to use your calculator on the SAT, there will be some instances in
which you will need to solve an equation algebraically. Even on the sections in which calculator use is
permitted, you may find it faster and more effective to use your mathematical skills to efficiently answer a
question. Another way ETS may make your calculator less effective is by asking you to solve for an
expression. A lot of the time, algebraic manipulation will be the means by which you can solve that
problem.

Here is an example: