| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
What is 4a9 - 7a9?
| -3 | |
| -3a9 | |
| -3a18 | |
| 11a18 |
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.
4a9 - 7a9 = -3a9
What is the area of a circle with a radius of 3?
| 64π | |
| 6π | |
| 5π | |
| 9π |
The formula for area is πr2:
a = πr2
a = π(32)
a = 9π
Simplify (y + 8)(y + 7)
| y2 - 15y + 56 | |
| y2 + 15y + 56 | |
| y2 + y - 56 | |
| y2 - y - 56 |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:
(y + 8)(y + 7)
(y x y) + (y x 7) + (8 x y) + (8 x 7)
y2 + 7y + 8y + 56
y2 + 15y + 56
Which of the following statements about a parallelogram is not true?
the perimeter of a parallelogram is the sum of the lengths of all sides |
|
opposite sides and adjacent angles are equal |
|
a parallelogram is a quadrilateral |
|
the area of a parallelogram is base x height |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).
A quadrilateral is a shape with __________ sides.
4 |
|
3 |
|
5 |
|
2 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.