ACT Math : Variables

Study concepts, example questions & explanations for ACT Math

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Example Questions

Example Question #61 : Variables

If  and  are constants and  is equivalent to , what is the value of ?

Possible Answers:

Cannot be determined from the given information.

Correct answer:

Explanation:

The question gives us a quadratic expression and its factored form. From this, we know 

At this point, solve for t.

Now, we can plug in  to get

.

Now, use FOIL to get s.

Example Question #4 : How To Multiply Binomials With The Distributive Property

Which expression is equal to ?

Possible Answers:

Correct answer:

Explanation:

In this problem, we are to multiply the two binomials using the FOIL method. This method stands for the order in which you multiply the variables. F stands for the first term of each binomial. O stands for the outside terms, meaning the first term of the first binomial and the last term of the second. I stands for the inside terms, meaning the second term of the first binomial and the first term of the second. L stands for the last term of each binomial. Once you do this, you simply add each part together to recieve your polynomial answer. Here is how our problem is solved:

Example Question #5 : How To Multiply Binomials With The Distributive Property

Which expression is equal to ?

Possible Answers:

Correct answer:

Explanation:

In this problem, we are to multiply the two binomials using the FOIL method. This method stands for the order in which you multiply the variables. F stands for the first term of each binomial. O stands for the outside terms, meaning the first term of the first binomial and the last term of the second. I stands for the inside terms, meaning the second term of the first binomial and the first term of the second. L stands for the last term of each binomial. Once you do this, you simply add each part together to recieve your polynomial answer. Here is how our problem is solved:

Example Question #6 : How To Multiply Binomials With The Distributive Property

Which expression is equal to ?

Possible Answers:

Correct answer:

Explanation:

In this problem, we are to multiply the two binomials using the FOIL method. This method stands for the order in which you multiply the variables. F stands for the first term of each binomial. O stands for the outside terms, meaning the first term of the first binomial and the last term of the second. I stands for the inside terms, meaning the second term of the first binomial and the first term of the second. L stands for the last term of each binomial. Once you do this, you simply add each part together to recieve your polynomial answer. Here is how our problem is solved:

Example Question #7 : How To Multiply Binomials With The Distributive Property

Which expression is equal to ?

Possible Answers:

Correct answer:

Explanation:

In this problem, we are to multiply the two binomials using the FOIL method. This method stands for the order in which you multiply the variables. F stands for the first term of each binomial. O stands for the outside terms, meaning the first term of the first binomial and the last term of the second. I stands for the inside terms, meaning the second term of the first binomial and the first term of the second. L stands for the last term of each binomial. Once you do this, you simply add each part together to recieve your polynomial answer. Here is how our problem is solved:

Example Question #8 : How To Multiply Binomials With The Distributive Property

Which expression is equal to ?

Possible Answers:

Correct answer:

Explanation:

In this problem, we are to multiply the two binomials using the FOIL method. This method stands for the order in which you multiply the variables. F stands for the first term of each binomial. O stands for the outside terms, meaning the first term of the first binomial and the last term of the second. I stands for the inside terms, meaning the second term of the first binomial and the first term of the second. L stands for the last term of each binomial. Once you do this, you simply add each part together to recieve your polynomial answer. Here is how our problem is solved:

Example Question #1 : How To Factor A Trinomial

Find the -intercepts:

Possible Answers:

 and 

 and 

 and 

 only

Correct answer:

 and 

Explanation:

-intercepts occur when .

1. Set the expression equal to  and rearrange:

 

2. Factor the expression:

 

3. Solve for :

and...

 

4. Rewrite the answers as coordinates:

 becomes  and  becomes .

Example Question #2 : How To Factor A Trinomial

Solve for  when .

Possible Answers:

Correct answer:

Explanation:

1. Factor the expression:

 

2. Solve for :

and...

Example Question #3 : How To Factor A Trinomial

Factor the following expression:

Possible Answers:

Correct answer:

Explanation:

Remember that when you factor a trinomial in the form , you need to find factors of  that add up to .

First, write down all the possible factors of .

Then add them to see which one gives you the value of 

Thus, the factored form of the expression is 

Example Question #4 : How To Factor A Trinomial

Factor the expression completely

Possible Answers:

Correct answer:

Explanation:

First, find any common factors. In this case, there is a common factor: 

Now, factor the trinomial.

To factor the trinomial, you will need to find factors of  that add up to .

List out the factors of , then add them.

Thus, 

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