| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
Which types of triangles will always have at least two sides of equal length?
equilateral, isosceles and right |
|
equilateral and right |
|
equilateral and isosceles |
|
isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
Simplify 7a x 2b.
| 14ab | |
| 14\( \frac{b}{a} \) | |
| 14\( \frac{a}{b} \) | |
| 9ab |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
7a x 2b = (7 x 2) (a x b) = 14ab
If a = c = 7, b = d = 8, and the blue angle = 66°, what is the area of this parallelogram?
| 6 | |
| 56 | |
| 4 | |
| 42 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 7 x 8
a = 56
The dimensions of this cube are height (h) = 9, length (l) = 3, and width (w) = 2. What is the surface area?
| 222 | |
| 102 | |
| 142 | |
| 314 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 3 x 2) + (2 x 2 x 9) + (2 x 3 x 9)
sa = (12) + (36) + (54)
sa = 102
If b = -8 and y = 2, what is the value of 8b(b - y)?
| 640 | |
| 81 | |
| 315 | |
| -224 |
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.)
8b(b - y)
8(-8)(-8 - 2)
8(-8)(-10)
(-64)(-10)
640