| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.78 |
| Score | 0% | 76% |
The formula for the area of a circle is which of the following?
a = π d |
|
a = π d2 |
|
a = π r2 |
|
a = 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.
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Last |
|
Inside |
|
First |
|
Odd |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.
If a = c = 7, b = d = 2, what is the area of this rectangle?
| 9 | |
| 36 | |
| 14 | |
| 48 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 7 x 2
a = 14
Simplify (4a)(4ab) + (9a2)(9b).
| 144ab2 | |
| 65a2b | |
| 97a2b | |
| 65ab2 |
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.
(4a)(4ab) + (9a2)(9b)
(4 x 4)(a x a x b) + (9 x 9)(a2 x b)
(16)(a1+1 x b) + (81)(a2b)
16a2b + 81a2b
97a2b
If angle a = 23° and angle b = 65° what is the length of angle c?
| 74° | |
| 136° | |
| 109° | |
| 92° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 23° - 65° = 92°