| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
Solve for a:
-7a - 1 = 3 - 3a
| -1 | |
| 4\(\frac{1}{2}\) | |
| 7 | |
| 1 |
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 equal sign and the answer on the other.
-7a - 1 = 3 - 3a
-7a = 3 - 3a + 1
-7a + 3a = 3 + 1
-4a = 4
a = \( \frac{4}{-4} \)
a = -1
If AD = 11 and BD = 6, AB = ?
| 5 | |
| 19 | |
| 20 | |
| 1 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDSimplify 4a x 8b.
| 32\( \frac{a}{b} \) | |
| 12ab | |
| 32ab | |
| 32\( \frac{b}{a} \) |
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 x 8b = (4 x 8) (a x b) = 32ab
The formula for the area of a circle is which of the following?
a = π d |
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a = π d2 |
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a = π r2 |
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a = π r |
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.
Which of the following statements about a parallelogram is not true?
a parallelogram is a quadrilateral |
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the area of a parallelogram is base x height |
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opposite sides and adjacent angles are equal |
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the perimeter of a parallelogram is the sum of the lengths of all sides |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).