| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
A trapezoid is a quadrilateral with one set of __________ sides.
equal length |
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equal angle |
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right angle |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
Simplify (7a)(2ab) + (4a2)(3b).
| 26ab2 | |
| 2ab2 | |
| 63a2b | |
| 26a2b |
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)(2ab) + (4a2)(3b)
(7 x 2)(a x a x b) + (4 x 3)(a2 x b)
(14)(a1+1 x b) + (12)(a2b)
14a2b + 12a2b
26a2b
Which of the following statements about math operations is incorrect?
you can subtract monomials that have the same variable and the same exponent |
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you can multiply monomials that have different variables and different exponents |
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you can add monomials that have the same variable and the same exponent |
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all of these statements are correct |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.
If c = 5 and z = -2, what is the value of 9c(c - z)?
| 360 | |
| 84 | |
| -352 | |
| 315 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
9c(c - z)
9(5)(5 + 2)
9(5)(7)
(45)(7)
315
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Odd |
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First |
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Inside |
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Last |
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.