| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
|
parallel |
|
equal length |
|
right angle |
A trapezoid is a quadrilateral with one set of parallel sides.
If angle a = 42° and angle b = 50° what is the length of angle c?
| 112° | |
| 46° | |
| 61° | |
| 88° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 42° - 50° = 88°
A(n) __________ is to a parallelogram as a square is to a rectangle.
quadrilateral |
|
rhombus |
|
triangle |
|
trapezoid |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
What is 5a3 + 3a3?
| 8a3 | |
| 2a6 | |
| a36 | |
| 8a6 |
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.
5a3 + 3a3 = 8a3
Solve for b:
5b - 3 = \( \frac{b}{-9} \)
| \(\frac{27}{46}\) | |
| \(\frac{18}{29}\) | |
| -4\(\frac{4}{17}\) | |
| \(\frac{18}{23}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.
5b - 3 = \( \frac{b}{-9} \)
-9 x (5b - 3) = b
(-9 x 5b) + (-9 x -3) = b
-45b + 27 = b
-45b + 27 - b = 0
-45b - b = -27
-46b = -27
b = \( \frac{-27}{-46} \)
b = \(\frac{27}{46}\)