GRE Subject Test: Math : GRE Subject Test: Math

Study concepts, example questions & explanations for GRE Subject Test: Math

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Example Questions

Example Question #4 : Find The Distance Between Two Parallel Lines

How far apart are the lines and ?

Possible Answers:

Correct answer:

Explanation:

To find the distance, choose any point on one of the lines. Plugging in  into the first equation can generate our first point:

 this gives us the point

We can find the distance between this point and the other line by putting the second line into the form :

 subtract the whole right side from both sides

multiply both sides by 

 now we see that

We can plug the coefficients and the point into the formula

where represents the point.

Example Question #5 : Find The Distance Between Two Parallel Lines

Find the distance between and

Possible Answers:

Correct answer:

Explanation:

To find the distance, choose any point on one of the lines. Plugging in  into the second equation can generate our first point:

 this gives us the point

We can find the distance between this point and the other line by putting the second line into the form :

 subtract the whole right side from both sides

multiply both sides by 

 now we see that

We can plug the coefficients and the point into the formula

where represents the point.

Example Question #6 : Find The Distance Between Two Parallel Lines

Find the distance between and 

Possible Answers:

Correct answer:

Explanation:

To find the distance, choose any point on one of the lines. Plugging in  into the first equation can generate our first point:

 this gives us the point

We can find the distance between this point and the other line by putting the second line into the form :

 subtract the whole right side from both sides

multiply both sides by 

 now we see that

We can plug the coefficients and the point into the formula

where represents the point.

Example Question #11 : Distance & Midpoint Formulas

Find the distance between the lines and

Possible Answers:

Correct answer:

Explanation:

To find the distance, choose any point on one of the lines. Plugging in into the first equation can generate our first point:

 this gives us the point

We can find the distance between this point and the other line by putting the second line into the form :

 subtract the whole right side from both sides

multiply both sides by 

 now we see that

We can plug the coefficients and the point into the formula

where represents the point.

Example Question #11 : Coordinate Geometry

Find the distance between the points  and .

Possible Answers:

None of the Above

Correct answer:

Explanation:

Step 1: Let's define the distance formula. The distance between two sets of coordinates can be found by using the equation:


In the equation, d is the distance. Also,  and  are the coordinate points. 

 , .

Step 2: Plug in the values for the missing variables into the equation:



Step 3: Simplify the inside of the square root. Remember that two minus signs next to each other will change to a plus sign.



Step 4: Add up the numbers in the parentheses:



Step 5: Evaluate the exponents:



Step 6: Add the numbers under the square root.



Step 7: Simplify the number inside the square root as much as possible. 

Let's divide by 4:

. We cannot break down 145 into another perfect square, so it has to go back into the radical. The square root of 4 is 2, and this will go on the outside.

The final answer is 


Example Question #31 : Gre Subject Test: Math

Find the distance between the points  and 

Possible Answers:

Correct answer:

Explanation:

Step 1: The distance formula is defined as:

.

Step 2. Identify what  and  are.




Step 3: Substitute each value for its place in the distance formula.

We will get this:



Step 4: Simplify the inside of step 3.



Step 5: Simplify the parentheses:



Step 6: Evaluate each exponent:



Step 7: Reduce  to lowest terms:

Divide  by :



Step 8: Rewrite 





Replace  with :



The simplified answer to the question is 

 

Example Question #31 : Gre Subject Test: Math

Given two points,  and , find the midpoint.

Possible Answers:

Correct answer:

Explanation:

Step 1: Define midpoint. The midpoint is a point located between two given points.. If I draw a line through these points, I get a straight line

Step 2: The midpoint formula is: 

Step 3. Plug in the values:



Step 4: Simplify each fraction in Step 3:



Step 5: Convert each fraction to a decimal from step 4:



The midpoint is 

Example Question #21 : Coordinate Geometry

Find the length of the line that connects the points:  and .

Possible Answers:

Correct answer:

Explanation:

Step 1: Recall the distance formula:



Step 2: Find ...



Step 3: Substitute the values into the equation:


Reduce the parentheses:


Evaluate the exponents and add:



Step 4: Reduce  into lowest terms...



Using rule of square roots, multiplying two roots with the same value on the inside just gives me the inside value..




The length of the line that connects both points is .

Example Question #31 : Gre Subject Test: Math

What is the distance between  and 

Possible Answers:

Correct answer:

Explanation:

Step 1: Plug in values into the distance formula:



Step 2: Evaluate the inside...



Step 3: Simplify...

Example Question #31 : Gre Subject Test: Math

Find the midpoint between  and 

Possible Answers:

Correct answer:

Explanation:

To find the midpoint you must use the equation

 Insert numbers

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