| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.79 |
| Score | 0% | 76% |
Simplify (5a)(5ab) + (9a2)(7b).
| -38a2b | |
| 88a2b | |
| -38ab2 | |
| 88ab2 |
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.
(5a)(5ab) + (9a2)(7b)
(5 x 5)(a x a x b) + (9 x 7)(a2 x b)
(25)(a1+1 x b) + (63)(a2b)
25a2b + 63a2b
88a2b
What is 5a5 + 4a5?
| 9 | |
| 9a5 | |
| a510 | |
| 20a10 |
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.
5a5 + 4a5 = 9a5
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Last |
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Inside |
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Odd |
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First |
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 |
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a = π d |
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a = π r |
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a = π r2 |
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.
Breaking apart a quadratic expression into a pair of binomials is called:
squaring |
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factoring |
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normalizing |
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deconstructing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.