Your Results | Global Average | |
---|---|---|
Questions | 5 | 5 |
Correct | 0 | 3.53 |
Score | 0% | 71% |
On this circle, line segment CD is the:
circumference |
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chord |
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diameter |
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radius |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
Simplify 9a x 4b.
36ab | |
36a2b2 | |
36\( \frac{a}{b} \) | |
13ab |
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.
9a x 4b = (9 x 4) (a x b) = 36ab
What is 9a - 4a?
36a2 | |
5a | |
a2 | |
13 |
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 - 4a = 5a
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
2lw x 2wh + 2lh |
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h x l x w |
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h2 x l2 x w2 |
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lw x wh + lh |
A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.
If b = 9 and z = -3, what is the value of -6b(b - z)?
-648 | |
-144 | |
-98 | |
0 |
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.)
-6b(b - z)
-6(9)(9 + 3)
-6(9)(12)
(-54)(12)
-648