Try Another Version of These Questions
This question asks for a number answer. Acceptable answers include whole numbers, integers (negative numbers), and decimal values. (These questions will normally require you to do calculations by hand or with a computer before you enter a final answer.)
In special cases, you may need to enter DNE for "Does not exist", oo for infinity, or -oo for negative infinity.
If your answer is not an exact value, you'll want to enter at least 3 decimal places unless the problem specifies otherwise.
Try it out:
Enter the number 31.3457 below exactly (no rounding)
Enter the number 31.3457 rounded to the nearest hundredth (two decimal places)
Enter the result of `31.3457 divide 0`
This question asks for a fraction, a reduced fraction, and a mixed number.
Enter fractions like 2/3 for `2/3`. For this type, the fraction does not need to be reduced, so `2/4` is considered the same as `1/2`.
For a reduced fraction answer, be sure to reduce your fraction to lowest terms. If `1/2` is the correct answer, `2/4` is not reduced, and would be marked wrong.
For both fraction and reduced fraction type problems, improper fractions are OK, like `10/3`, but mixed numbers will not be accepted.
For a mixed number problem, enter your answer like 5 1/3 for `5 1/3`. Improper fractions will not be accepted. Also, be sure to reduce the fractional portion of the mixed number to lowest terms.
Try it here. Use the Preview button to see how the computer is interpreting what you typed.
A) Enter `10/30`: (Does NOT have to be reduced to lowest terms)
B) Enter `13/39` in reduced form: (MUST be reduced to lowest terms)
C) Enter `10+31/39`: as a mixed number. (Make sure you reduce, if necessary.)
Box 1: Enter your answer as a fraction (like 3/5 or 10/4) or as an integer (like 4 or -2)
Do not enter mixed numbers
Enter DNE for Does Not Exist, oo for Infinity
Box 2: Enter your answer as a reduced fraction (like 5/3, not 10/6) or as an integer (like 4 or -2)
Do not enter mixed numbers
Enter DNE for Does Not Exist, oo for Infinity
Box 3: Enter your answer as a reduced mixed number or as an integer. Example: 2 1/2 = 2 ½
Enter DNE for Does Not Exist, oo for Infinity
This question asks for an algebraic expression.
With these types of questions, be sure to use the variables indicated. In your answer, you can also use mathematical expressions for numerical calculations.
Examples:
| Type | To get | Comment |
|---|---|---|
| -3x^2+5 | `-3x^2+5` | Notice the ^ symbol for powers |
| (2+x)/(3-x) | `(2+x)/(3-x)` | Notice you need parentheses around the numerator and denominator |
| sqrt(x-5) | `sqrt(x-5)` | Be sure to put parentheses around the input: sqrt(x+3) is OK, but sqrtx+3 or sqrt x+3 is not. |
| 3^(x+7) | `3^(x+7)` | Parentheses keeps the `x+7` together as the power |
| 1/(x(x+1)) | `1/(x(x+1))` | You may need nested parentheses |
| 5/3x+2/3 | `5/3x+2/3` | Fractions are automatically formatted vertically when previewed |
Unless the problem gives specific directions, any algebraically equivalent expression is acceptable. For example, if the answer was `(x+2)(x+3)`, then `(x+3)(x+2)` and `(3+x)(2+x)` would also be acceptable.
Try it here. Use the Preview button to see how the computer is interpreting what you typed.
A) Enter the expression `5 x^2 -7 x + 3`:
Your input:
B) Enter the expression `(7 y + 2)/(5 y^2)`:
Your input:
C) Enter the expression `w^2 + 5 sqrt(w+1)`:
Your input:
Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
Box 2: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
Box 3: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Be sure your variables match those in the question
Some questions ask for ordered pairs to give the coordinates of a point on a plane.
Enter these answers as you'd write the ordered pair: `(x,y)`
For example, the point where `x = 3` and `y=5` would be written: (3,5)
If the question asks for several points, list each point separated with commas, like: (1,2), (3,4)
Try it now. Enter the points shown on the graph below
Points:
Box 1: Enter your answer a list of points separated with commas. Example: (1,2), (3.5172,5)
Enter DNE for Does Not Exist
For intervals of values, enter your answer using interval notation. Here are some examples of how interval notation relates to inequalities:
| Inequality | Interval Notation |
|---|---|
| `3 lt x lt 5` | (3,5) |
| `3 lt x le 5` | (3,5] |
| `x gt 3` | `(3,oo)` |
| `3 lt x lt 5 \ "or" \ 7 lt x lt 9` | `(3,5)uu(7,9)` |
With inequalities, we use "less than": < or "greater than": > to exclude the endpoint of the interval. With interval notation, we use use round parentheses, ( or ).
With inequalities, we use "less than or equal to": ≤ or "greater than or equal to": ≥ to include the endpoint of the interval. With interval notation, we use use square brackets, [ or ].
To combine two intervals, use U (an uppercase letter u) for union: `uu`
Use oo (two lowercase letter o's) for infinity: `oo`
For example, to enter `(-oo,-2]uu(3,6]`, you would type: (-oo,-2]U(3,6]
Try it now. Enter the interval equivalent to `2 lt x le 5 \ "or" \ x gt 7`
Box 1: Enter your answer using interval notation. Example: [2.1,5.6172)
Use U for union to combine intervals. Example: (-oo,2] U [4,oo)
Enter DNE for an empty set. Use oo to enter Infinity.
Sometimes an equation or problem will have multiple solutions. When there are multiple solutions, you can list them, separated by a comma.
For example, if the solutions were 5 and 10, you'd enter: 5,10
Try it now by listing all the positive even numbers less than 10
Box 1: Enter your answer as a list of integer or decimal numbers separated with commas: Examples: -4, 3, 2.5172
Enter DNE for Does Not Exist, oo for Infinity
You can enter whole numbers, negative numbers, or decimal numbers. If you enter a decimal value, be sure to give at least 3 decimal places.
Alternatively, you can enter mathematical expressions. Some examples:
| Enter | To get |
|---|---|
| sqrt(4) | `sqrt(4)` = 2 |
| 2/(5-3) | `2/(5-3)` = 1 |
| 3^2 | `3^2` = 9 |
Try it here. Use the Preview button to see how the computer is interpreting what you typed.
Enter `sqrt(5)/2`:
Enter `7/3`:
Enter `6^2/3^2`:
Enter `1/(2^3-3)`:
Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Box 2: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Box 3: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Box 4: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Try this by selecting "right" below.
Box 1: Select the best answer