| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
Simplify (9a)(3ab) - (6a2)(3b).
| 108ab2 | |
| 45a2b | |
| 9a2b | |
| -9ab2 |
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.
(9a)(3ab) - (6a2)(3b)
(9 x 3)(a x a x b) - (6 x 3)(a2 x b)
(27)(a1+1 x b) - (18)(a2b)
27a2b - 18a2b
9a2b
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Odd |
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Last |
|
First |
|
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.
The formula for the area of a circle is which of the following?
a = π d2 |
|
a = π d |
|
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.
The formula for the area of a circle is which of the following?
c = π r |
|
c = π d2 |
|
c = π r2 |
|
c = 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.
What is 4a + 2a?
| 6a | |
| 8a2 | |
| a2 | |
| 2a2 |
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.
4a + 2a = 6a