| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.58 |
| Score | 0% | 72% |
What is 8a7 - 7a7?
| 1a7 | |
| 15 | |
| 56a7 | |
| a14 |
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.
8a7 - 7a7 = 1a7
The formula for the area of a circle is which of the following?
a = π r |
|
a = π r2 |
|
a = π d2 |
|
a = 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.
If the length of AB equals the length of BD, point B __________ this line segment.
intersects |
|
trisects |
|
midpoints |
|
bisects |
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.
If b = 2 and y = -1, what is the value of -6b(b - y)?
| -36 | |
| -81 | |
| -14 | |
| -24 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
-6b(b - y)
-6(2)(2 + 1)
-6(2)(3)
(-12)(3)
-36
A coordinate grid is composed of which of the following?
origin |
|
all of these |
|
y-axis |
|
x-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.