| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.64 |
| Score | 0% | 73% |
A(n) __________ is two expressions separated by an equal sign.
formula |
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problem |
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expression |
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equation |
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.
What is the area of a circle with a radius of 4?
| 2π | |
| 16π | |
| 3π | |
| 9π |
The formula for area is πr2:
a = πr2
a = π(42)
a = 16π
Which of the following expressions contains exactly two terms?
quadratic |
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monomial |
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binomial |
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polynomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
A trapezoid is a quadrilateral with one set of __________ sides.
equal length |
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parallel |
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equal angle |
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right angle |
A trapezoid is a quadrilateral with one set of parallel sides.
Simplify (8a)(8ab) - (5a2)(7b).
| 99ab2 | |
| 99a2b | |
| -29ab2 | |
| 29a2b |
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.
(8a)(8ab) - (5a2)(7b)
(8 x 8)(a x a x b) - (5 x 7)(a2 x b)
(64)(a1+1 x b) - (35)(a2b)
64a2b - 35a2b
29a2b