| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.77 |
| Score | 0% | 75% |
Simplify (7a)(7ab) + (2a2)(6b).
| 112ab2 | |
| 61a2b | |
| -37ab2 | |
| -37a2b |
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)(7ab) + (2a2)(6b)
(7 x 7)(a x a x b) + (2 x 6)(a2 x b)
(49)(a1+1 x b) + (12)(a2b)
49a2b + 12a2b
61a2b
What is the circumference of a circle with a diameter of 10?
| 19π | |
| 11π | |
| 4π | |
| 10π |
The formula for circumference is circle diameter x π:
c = πd
c = 10π
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Last |
|
First |
|
Inside |
|
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.
What is 9a + 5a?
| 14a2 | |
| 4 | |
| 45a2 | |
| 14a |
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.
9a + 5a = 14a
The formula for the area of a circle is which of the following?
a = π d2 |
|
a = π r |
|
a = π r2 |
|
a = 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.