| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
What is 8a - 8a?
| 64a | |
| 0a | |
| a2 | |
| 16a2 |
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.
8a - 8a = 0a
The dimensions of this cube are height (h) = 3, length (l) = 2, and width (w) = 9. What is the volume?
| 54 | |
| 10 | |
| 64 | |
| 175 |
The volume of a cube is height x length x width:
v = h x l x w
v = 3 x 2 x 9
v = 54
What is 7a3 + 8a3?
| 56a6 | |
| 15a3 | |
| -1 | |
| 15a6 |
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.
7a3 + 8a3 = 15a3
The formula for the area of a circle is which of the following?
c = π d |
|
c = π d2 |
|
c = π r2 |
|
c = 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.
What is the area of a circle with a radius of 5?
| 5π | |
| 4π | |
| 25π | |
| 49π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π