| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
What is 4a - 3a?
| 12a | |
| 12a2 | |
| 1a | |
| 7 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
4a - 3a = 1a
The dimensions of this trapezoid are a = 5, b = 5, c = 7, d = 5, and h = 4. What is the area?
| 20 | |
| 22\(\frac{1}{2}\) | |
| 18 | |
| 13\(\frac{1}{2}\) |
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(5 + 5)(4)
a = ½(10)(4)
a = ½(40) = \( \frac{40}{2} \)
a = 20
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
acute, obtuse |
|
vertical, supplementary |
|
obtuse, acute |
|
supplementary, vertical |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
Solve for y:
-7y + 8 > 3 - y
| y > \(\frac{5}{6}\) | |
| y > 2 | |
| y > -1 | |
| y > -4 |
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.
-7y + 8 > 3 - y
-7y > 3 - y - 8
-7y + y > 3 - 8
-6y > -5
y > \( \frac{-5}{-6} \)
y > \(\frac{5}{6}\)
On this circle, line segment CD is the:
circumference |
|
diameter |
|
chord |
|
radius |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).