### All SAT Math Resources

## Example Questions

### Example Question #1 : Polynomials

Find the degree of the polynomial:

**Possible Answers:**

**Correct answer:**

To find the degree of a polynomial we must find the largest exponent in the function.

The degree of the polynomial is 5, as the largest exponent of is 5 in the second term.

### Example Question #2 : Polynomials

What is the degree of the polynomial ?

**Possible Answers:**

**Correct answer:**

When a polynomial has more than one variable, we need to find the degree by adding the exponents of each variable in each term.

has a degree of 4 (since both exponents add up to 4), so the polynomial has a degree of 4 as this term has the highest degree.

### Example Question #3 : Polynomials

Find the degree of the following polynomial:

**Possible Answers:**

**Correct answer:**

When a polynomial has more than one variable, we need to find the degree by adding the exponents of each variable in each term.

Even though has a degree of 5, it is not the highest degree in the polynomial -

has a degree of 6 (with exponents 1, 2, and 3). Therefore, the degree of the polynomial is 6.

### Example Question #4 : Polynomials

Solve each problem and decide which is the best of the choices given.

What is the degree of the following polynomial?

**Possible Answers:**

**Correct answer:**

The degree is defined as the largest exponent in the polynomial. In this case, it is .

### Example Question #5 : Polynomials

What is the degree of this polynomial?

**Possible Answers:**

Degree 12

Degree 8

Degree 6

Degree 7

Degree 10

**Correct answer:**

Degree 8

When an exponent with a power is raised to another power, the value of the power are multiplied.

When multiplying exponents you add the powers together

The degree of a polynomial is the determined by the highest power. In this problem the highest power is 8.

### Example Question #6 : Polynomials

Find the degree of the following polynomial:

**Possible Answers:**

**Correct answer:**

The degree of a polynomial is the largest exponent on one of its variables (for a single variable), or the largest sum of exponents on variables in a single term (for multiple variables).

Here, the term with the largest exponent is , so the degree of the whole polynomial is 6.

### Example Question #1 : Polynomials

If 3 less than 15 is equal to 2x, then 24/x must be greater than

**Possible Answers:**

4

6

3

5

**Correct answer:**

3

Set up an equation for the sentence: 15 – 3 = 2x and solve for x. X equals 6. If you plug in 6 for x in the expression 24/x, you get** **24/6 = 4. 4 is only choice greater than a.

### Example Question #8 : Polynomials

Given a♦b = (a+b)/(a-b) and b♦a = (b+a)/(b-a), which of the following statement(s) is(are) true:

I. a♦b = -(b♦a)

II. (a♦b)(b♦a) = (a♦b)^{2}

III. a♦b + b♦a = 0

**Possible Answers:**

I and III

I and II

I, II and III

II & III

I only

**Correct answer:**

I and III

Notice that - (a-b) = b-a, so statement I & III are true after substituting the expression. Substitute the expression for statement II gives ((a+b)/(a-b))((a+b)/(b-a))=((a+b)(b+a))/((-1)(a-b)(a-b))=-1 〖(a+b)〗^{2}/〖(a-b)〗^{2} =-((a+b)/(a-b))^{2} = -(a♦b)^{2} ≠ (a♦b)^{2}

### Example Question #9 : Polynomials

If a positive integer *a* is divided by 7, the remainder is 4. What is the remainder if 3*a* + 5 is divided by 3?

**Possible Answers:**

6

3

4

2

5

**Correct answer:**

2

The best way to solve this problem is to plug in an appropriate value for *a. *For example, plug-in 11 for *a *because 11 divided by 7 will give us a remainder of 4.

Then 3*a + 5*, where *a *= 11, gives us 38. Then 38 divided by 3 gives a remainder of 2.

The algebra method is as follows:

*a* divided by 7 gives us some positive integer *b, *with a remainder of 4.

Thus,

*a */ 7 = *b* 4/7

*a */ 7 = (7*b + *4) / 7

*a = *(7*b* + 4)

then 3*a + 5 = *3 (7*b *+ 4) + 5

(3*a*+5)/3 = [3(7*b *+ 4) + 5] / 3

= (7*b *+ 4) + 5/3

The first half of this expression (7*b* + 4) is a positive integer, but the second half of this expression (5/3) gives us a remainder of 2.

### Example Question #10 : Polynomials

**Possible Answers:**

100

36

42

45

38

**Correct answer:**

42