| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.89 |
| Score | 0% | 58% |
Which of the following statements about math operations is incorrect?
you can add monomials that have the same variable and the same exponent |
|
you can multiply monomials that have different variables and different exponents |
|
you can subtract monomials that have the same variable and the same exponent |
|
all of these statements are correct |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.
Solve for c:
-9c - 4 = 9 - 2c
| \(\frac{2}{5}\) | |
| -1\(\frac{6}{7}\) | |
| 3 | |
| 1\(\frac{1}{3}\) |
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.
-9c - 4 = 9 - 2c
-9c = 9 - 2c + 4
-9c + 2c = 9 + 4
-7c = 13
c = \( \frac{13}{-7} \)
c = -1\(\frac{6}{7}\)
If the length of AB equals the length of BD, point B __________ this line segment.
intersects |
|
bisects |
|
trisects |
|
midpoints |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.
A(n) __________ is to a parallelogram as a square is to a rectangle.
rhombus |
|
quadrilateral |
|
triangle |
|
trapezoid |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
The dimensions of this cylinder are height (h) = 3 and radius (r) = 8. What is the volume?
| 36π | |
| 245π | |
| 8π | |
| 192π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(82 x 3)
v = 192π