| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
What is 6a + 7a?
| a2 | |
| 13a | |
| 13 | |
| 42a2 |
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.
6a + 7a = 13a
Order the following types of angle from least number of degrees to most number of degrees.
acute, right, obtuse |
|
right, obtuse, acute |
|
acute, obtuse, right |
|
right, acute, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
Find the value of c:
-9c + x = -7
5c + 7x = 9
| \(\frac{7}{15}\) | |
| -\(\frac{1}{14}\) | |
| \(\frac{16}{31}\) | |
| \(\frac{29}{34}\) |
You need to find the value of c so solve the first equation in terms of x:
-9c + x = -7
x = -7 + 9c
then substitute the result (-7 - -9c) into the second equation:
5c + 7(-7 + 9c) = 9
5c + (7 x -7) + (7 x 9c) = 9
5c - 49 + 63c = 9
5c + 63c = 9 + 49
68c = 58
c = \( \frac{58}{68} \)
c = \(\frac{29}{34}\)
If side x = 12cm, side y = 15cm, and side z = 11cm what is the perimeter of this triangle?
| 26cm | |
| 38cm | |
| 23cm | |
| 31cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 12cm + 15cm + 11cm = 38cm
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
|
equal length |
|
right angle |
|
equal angle |
A trapezoid is a quadrilateral with one set of parallel sides.