| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.52 |
| Score | 0% | 50% |
A quadrilateral is a shape with __________ sides.
5 |
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2 |
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4 |
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3 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
The formula for the area of a circle is which of the following?
c = π r2 |
|
c = π d2 |
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c = π r |
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c = π d |
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.
Simplify (5a)(8ab) - (7a2)(8b).
| -16a2b | |
| 195ab2 | |
| 195a2b | |
| 96a2b |
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)(8ab) - (7a2)(8b)
(5 x 8)(a x a x b) - (7 x 8)(a2 x b)
(40)(a1+1 x b) - (56)(a2b)
40a2b - 56a2b
-16a2b
Solve -6c + 6c = -7c + 3z - 1 for c in terms of z.
| -3z - 1 | |
| \(\frac{11}{12}\)z - \(\frac{2}{3}\) | |
| z - 1 | |
| 7z - 8 |
To solve this equation, isolate the variable for which you are solving (c) on one side of the equation and put everything else on the other side.
-6c + 6z = -7c + 3z - 1
-6c = -7c + 3z - 1 - 6z
-6c + 7c = 3z - 1 - 6z
c = -3z - 1
The endpoints of this line segment are at (-2, -10) and (2, 2). What is the slope of this line?
| -2\(\frac{1}{2}\) | |
| 3 | |
| 2 | |
| -3 |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -10) and (2, 2) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(2.0) - (-10.0)}{(2) - (-2)} \) = \( \frac{12}{4} \)