| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.61 |
| Score | 0% | 72% |
What is the area of a circle with a radius of 5?
| 36π | |
| 3π | |
| 25π | |
| 4π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
If a = c = 3, b = d = 8, and the blue angle = 75°, what is the area of this parallelogram?
| 24 | |
| 12 | |
| 28 | |
| 9 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 3 x 8
a = 24
Simplify (6a)(5ab) - (5a2)(5b).
| -5ab2 | |
| 110a2b | |
| 5a2b | |
| 55a2b |
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.
(6a)(5ab) - (5a2)(5b)
(6 x 5)(a x a x b) - (5 x 5)(a2 x b)
(30)(a1+1 x b) - (25)(a2b)
30a2b - 25a2b
5a2b
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
First |
|
Odd |
|
Last |
|
Inside |
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.
A(n) __________ is two expressions separated by an equal sign.
expression |
|
formula |
|
equation |
|
problem |
An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.