| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
Simplify (4a)(3ab) - (5a2)(4b).
| -8a2b | |
| 63a2b | |
| 32ab2 | |
| 63ab2 |
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.
(4a)(3ab) - (5a2)(4b)
(4 x 3)(a x a x b) - (5 x 4)(a2 x b)
(12)(a1+1 x b) - (20)(a2b)
12a2b - 20a2b
-8a2b
Which of the following expressions contains exactly two terms?
polynomial |
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quadratic |
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binomial |
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monomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
Which of the following is not true about both rectangles and squares?
all interior angles are right angles |
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the lengths of all sides are equal |
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the perimeter is the sum of the lengths of all four sides |
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the area is length x width |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).
The dimensions of this cube are height (h) = 3, length (l) = 3, and width (w) = 1. What is the volume?
| 9 | |
| 180 | |
| 90 | |
| 20 |
The volume of a cube is height x length x width:
v = h x l x w
v = 3 x 3 x 1
v = 9
A(n) __________ is to a parallelogram as a square is to a rectangle.
triangle |
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trapezoid |
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quadrilateral |
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rhombus |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.