| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.83 |
| Score | 0% | 57% |
What is 9a8 - 3a8?
| 12 | |
| 6a16 | |
| 6a8 | |
| 27a16 |
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.
9a8 - 3a8 = 6a8
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h |
|
π r2h2 |
|
2(π r2) + 2π rh |
|
4π r2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
Solve for z:
6z + 8 < 6 + z
| z < \(\frac{2}{7}\) | |
| z < -3 | |
| z < \(\frac{1}{4}\) | |
| z < -\(\frac{2}{5}\) |
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 < sign and the answer on the other.
6z + 8 < 6 + z
6z < 6 + z - 8
6z - z < 6 - 8
5z < -2
z < \( \frac{-2}{5} \)
z < -\(\frac{2}{5}\)
If a = c = 6, b = d = 4, and the blue angle = 59°, what is the area of this parallelogram?
| 12 | |
| 24 | |
| 8 | |
| 35 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 4
a = 24
Solve 6c - 7c = 8c + 6y + 9 for c in terms of y.
| \(\frac{1}{5}\)y - 1 | |
| -1\(\frac{2}{11}\)y + \(\frac{9}{11}\) | |
| -6\(\frac{1}{2}\)y - 4\(\frac{1}{2}\) | |
| \(\frac{5}{8}\)y + \(\frac{5}{8}\) |
To solve this equation, isolate the variable for which you are solving (c) on one side of the equation and put everything else on the other side.
6c - 7y = 8c + 6y + 9
6c = 8c + 6y + 9 + 7y
6c - 8c = 6y + 9 + 7y
-2c = 13y + 9
c = \( \frac{13y + 9}{-2} \)
c = \( \frac{13y}{-2} \) + \( \frac{9}{-2} \)
c = -6\(\frac{1}{2}\)y - 4\(\frac{1}{2}\)