| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.36 |
| Score | 0% | 67% |
Simplify 2a x 2b.
| 4\( \frac{b}{a} \) | |
| 4\( \frac{a}{b} \) | |
| 4ab | |
| 4a2b2 |
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.
2a x 2b = (2 x 2) (a x b) = 4ab
If the length of AB equals the length of BD, point B __________ this line segment.
midpoints |
|
bisects |
|
trisects |
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intersects |
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.
Simplify (9a)(8ab) + (5a2)(5b).
| 97a2b | |
| 47a2b | |
| -47ab2 | |
| 170a2b |
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.
(9a)(8ab) + (5a2)(5b)
(9 x 8)(a x a x b) + (5 x 5)(a2 x b)
(72)(a1+1 x b) + (25)(a2b)
72a2b + 25a2b
97a2b
Solve for b:
-7b - 5 < 8 - 6b
| b < 1\(\frac{1}{3}\) | |
| b < -\(\frac{4}{5}\) | |
| b < -1\(\frac{4}{5}\) | |
| b < -13 |
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.
-7b - 5 < 8 - 6b
-7b < 8 - 6b + 5
-7b + 6b < 8 + 5
-b < 13
b < \( \frac{13}{-1} \)
b < -13
If side x = 9cm, side y = 11cm, and side z = 15cm what is the perimeter of this triangle?
| 30cm | |
| 35cm | |
| 26cm | |
| 20cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 9cm + 11cm + 15cm = 35cm