| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.83 |
| Score | 0% | 57% |
If a = c = 6, b = d = 4, and the blue angle = 69°, what is the area of this parallelogram?
| 56 | |
| 24 | |
| 27 | |
| 21 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 4
a = 24
Simplify (7a)(2ab) - (7a2)(3b).
| 7ab2 | |
| 35ab2 | |
| 35a2b | |
| -7a2b |
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.
(7a)(2ab) - (7a2)(3b)
(7 x 2)(a x a x b) - (7 x 3)(a2 x b)
(14)(a1+1 x b) - (21)(a2b)
14a2b - 21a2b
-7a2b
Solve for c:
-3c - 9 > -8 + 2c
| c > \(\frac{1}{2}\) | |
| c > \(\frac{1}{3}\) | |
| c > \(\frac{1}{9}\) | |
| c > -\(\frac{1}{5}\) |
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.
-3c - 9 > -8 + 2c
-3c > -8 + 2c + 9
-3c - 2c > -8 + 9
-5c > 1
c > \( \frac{1}{-5} \)
c > -\(\frac{1}{5}\)
The formula for the area of a circle is which of the following?
c = π d |
|
c = π r2 |
|
c = π d2 |
|
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.
If a = c = 9, b = d = 5, what is the area of this rectangle?
| 30 | |
| 18 | |
| 45 | |
| 6 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 9 x 5
a = 45