| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.80 |
| Score | 0% | 56% |
Solve for c:
c - 9 = 9 - 4c
| -4 | |
| 9 | |
| 3\(\frac{3}{5}\) | |
| -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.
c - 9 = 9 - 4c
c = 9 - 4c + 9
c + 4c = 9 + 9
5c = 18
c = \( \frac{18}{5} \)
c = 3\(\frac{3}{5}\)
If AD = 21 and BD = 18, AB = ?
| 12 | |
| 3 | |
| 1 | |
| 7 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDThe dimensions of this trapezoid are a = 6, b = 3, c = 9, d = 6, and h = 5. What is the area?
| 30 | |
| 25\(\frac{1}{2}\) | |
| 37\(\frac{1}{2}\) | |
| 22\(\frac{1}{2}\) |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(3 + 6)(5)
a = ½(9)(5)
a = ½(45) = \( \frac{45}{2} \)
a = 22\(\frac{1}{2}\)
A trapezoid is a quadrilateral with one set of __________ sides.
equal length |
|
right angle |
|
equal angle |
|
parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
The formula for the area of a circle is which of the following?
c = π r |
|
c = π d2 |
|
c = π r2 |
|
c = π d |
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.