| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
If BD = 25 and AD = 28, AB = ?
| 6 | |
| 1 | |
| 3 | |
| 18 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDIf angle a = 53° and angle b = 21° what is the length of angle c?
| 106° | |
| 112° | |
| 110° | |
| 77° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 53° - 21° = 106°
If a = c = 6, b = d = 9, and the blue angle = 51°, what is the area of this parallelogram?
| 40 | |
| 18 | |
| 10 | |
| 54 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 9
a = 54
Find the value of c:
-2c + z = -3
4c - 9z = 1
| -4 | |
| 1\(\frac{6}{7}\) | |
| -5\(\frac{5}{7}\) | |
| -2\(\frac{11}{23}\) |
You need to find the value of c so solve the first equation in terms of z:
-2c + z = -3
z = -3 + 2c
then substitute the result (-3 - -2c) into the second equation:
4c - 9(-3 + 2c) = 1
4c + (-9 x -3) + (-9 x 2c) = 1
4c + 27 - 18c = 1
4c - 18c = 1 - 27
-14c = -26
c = \( \frac{-26}{-14} \)
c = 1\(\frac{6}{7}\)
Simplify 3a x 8b.
| 11ab | |
| 24ab | |
| 24a2b2 | |
| 24\( \frac{a}{b} \) |
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.
3a x 8b = (3 x 8) (a x b) = 24ab