| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.73 |
| Score | 0% | 75% |
Which of the following expressions contains exactly two terms?
binomial |
|
monomial |
|
quadratic |
|
polynomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
If a = c = 6, b = d = 4, what is the area of this rectangle?
| 24 | |
| 15 | |
| 9 | |
| 21 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 6 x 4
a = 24
What is 4a - 8a?
| 12 | |
| -4a2 | |
| 12a2 | |
| -4a |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
4a - 8a = -4a
If b = -2 and x = 8, what is the value of 2b(b - x)?
| 42 | |
| -12 | |
| -24 | |
| 40 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
2b(b - x)
2(-2)(-2 - 8)
2(-2)(-10)
(-4)(-10)
40
Simplify (2a)(6ab) + (5a2)(2b).
| 22ab2 | |
| -2a2b | |
| 22a2b | |
| 2a2b |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
(2a)(6ab) + (5a2)(2b)
(2 x 6)(a x a x b) + (5 x 2)(a2 x b)
(12)(a1+1 x b) + (10)(a2b)
12a2b + 10a2b
22a2b