| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.88 |
| Score | 0% | 78% |
What is 2a + 7a?
| 14a | |
| 14a2 | |
| -5a2 | |
| 9a |
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.
2a + 7a = 9a
If angle a = 26° and angle b = 48° what is the length of angle c?
| 106° | |
| 85° | |
| 91° | |
| 90° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 26° - 48° = 106°
If a = c = 9, b = d = 7, what is the area of this rectangle?
| 21 | |
| 48 | |
| 10 | |
| 63 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 9 x 7
a = 63
If b = -7 and y = -8, what is the value of -4b(b - y)?
| -108 | |
| -18 | |
| 24 | |
| 28 |
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.)
-4b(b - y)
-4(-7)(-7 + 8)
-4(-7)(1)
(28)(1)
28
A quadrilateral is a shape with __________ sides.
2 |
|
5 |
|
3 |
|
4 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.