| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.98 |
| Score | 0% | 60% |
Simplify (4a)(7ab) - (5a2)(2b).
| -18ab2 | |
| 38ab2 | |
| 77ab2 | |
| 18a2b |
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.
(4a)(7ab) - (5a2)(2b)
(4 x 7)(a x a x b) - (5 x 2)(a2 x b)
(28)(a1+1 x b) - (10)(a2b)
28a2b - 10a2b
18a2b
If angle a = 48° and angle b = 34° what is the length of angle c?
| 128° | |
| 78° | |
| 52° | |
| 98° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 48° - 34° = 98°
If the length of AB equals the length of BD, point B __________ this line segment.
intersects |
|
bisects |
|
trisects |
|
midpoints |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.
Solve -9a - 7a = -4a + 9x - 6 for a in terms of x.
| -3\(\frac{1}{5}\)x + 1\(\frac{1}{5}\) | |
| 1\(\frac{1}{6}\)x + 1\(\frac{1}{2}\) | |
| 1\(\frac{7}{8}\)x + \(\frac{3}{8}\) | |
| x + \(\frac{2}{7}\) |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
-9a - 7x = -4a + 9x - 6
-9a = -4a + 9x - 6 + 7x
-9a + 4a = 9x - 6 + 7x
-5a = 16x - 6
a = \( \frac{16x - 6}{-5} \)
a = \( \frac{16x}{-5} \) + \( \frac{-6}{-5} \)
a = -3\(\frac{1}{5}\)x + 1\(\frac{1}{5}\)
Simplify 6a x 6b.
| 36\( \frac{b}{a} \) | |
| 36a2b2 | |
| 12ab | |
| 36ab |
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.
6a x 6b = (6 x 6) (a x b) = 36ab