| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.89 |
| Score | 0% | 78% |
A coordinate grid is composed of which of the following?
all of these |
|
y-axis |
|
x-axis |
|
origin |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.
What is 9a - 8a?
| 17 | |
| 72a | |
| a2 | |
| 1a |
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.
9a - 8a = 1a
Solve for z:
-3z - 2 > -9 - 8z
| z > -\(\frac{1}{2}\) | |
| z > -\(\frac{2}{3}\) | |
| z > -2\(\frac{1}{4}\) | |
| z > -1\(\frac{2}{5}\) |
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.
-3z - 2 > -9 - 8z
-3z > -9 - 8z + 2
-3z + 8z > -9 + 2
5z > -7
z > \( \frac{-7}{5} \)
z > -1\(\frac{2}{5}\)
What is 2a + 3a?
| a2 | |
| 6a2 | |
| 5a | |
| -a2 |
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.
2a + 3a = 5a
If side x = 8cm, side y = 11cm, and side z = 10cm what is the perimeter of this triangle?
| 38cm | |
| 26cm | |
| 27cm | |
| 29cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 8cm + 11cm + 10cm = 29cm