| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.84 |
| Score | 0% | 57% |
If BD = 3 and AD = 11, AB = ?
| 6 | |
| 18 | |
| 5 | |
| 8 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDThe formula for the area of a circle is which of the following?
a = π d |
|
a = π d2 |
|
a = π r |
|
a = π r2 |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
The formula for the area of a circle is which of the following?
c = π d |
|
c = π r |
|
c = π r2 |
|
c = π d2 |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
Solve for z:
4z + 5 < \( \frac{z}{-3} \)
| z < -10 | |
| z < -1\(\frac{2}{13}\) | |
| z < \(\frac{2}{3}\) | |
| z < 1\(\frac{11}{37}\) |
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.
4z + 5 < \( \frac{z}{-3} \)
-3 x (4z + 5) < z
(-3 x 4z) + (-3 x 5) < z
-12z - 15 < z
-12z - 15 - z < 0
-12z - z < 15
-13z < 15
z < \( \frac{15}{-13} \)
z < -1\(\frac{2}{13}\)
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
|
vertical, supplementary |
|
obtuse, acute |
|
acute, obtuse |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).