| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
Which of the following expressions contains exactly two terms?
quadratic |
|
monomial |
|
binomial |
|
polynomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
What is 4a - 5a?
| 20a2 | |
| a2 | |
| -1a | |
| 9 |
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 - 5a = -1a
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
|
equal angle |
|
right angle |
|
equal length |
A trapezoid is a quadrilateral with one set of parallel sides.
Solve 4a - a = 6a + 3x - 2 for a in terms of x.
| 1\(\frac{1}{3}\)x + 2 | |
| 2x + 2\(\frac{1}{4}\) | |
| -\(\frac{2}{9}\)x - \(\frac{2}{9}\) | |
| -2x + 1 |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
4a - x = 6a + 3x - 2
4a = 6a + 3x - 2 + x
4a - 6a = 3x - 2 + x
-2a = 4x - 2
a = \( \frac{4x - 2}{-2} \)
a = \( \frac{4x}{-2} \) + \( \frac{-2}{-2} \)
a = -2x + 1
If b = -4 and z = 9, what is the value of -9b(b - z)?
| 350 | |
| -108 | |
| -468 | |
| 144 |
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.)
-9b(b - z)
-9(-4)(-4 - 9)
-9(-4)(-13)
(36)(-13)
-468