| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.65 |
| Score | 0% | 73% |
If c = 1 and x = -8, what is the value of -9c(c - x)?
| -16 | |
| 90 | |
| 252 | |
| -81 |
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 - x)
-9(1)(1 + 8)
-9(1)(9)
(-9)(9)
-81
If side x = 8cm, side y = 6cm, and side z = 6cm what is the perimeter of this triangle?
| 20cm | |
| 36cm | |
| 31cm | |
| 38cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 8cm + 6cm + 6cm = 20cm
Which of the following statements about a parallelogram is not true?
the perimeter of a parallelogram is the sum of the lengths of all sides |
|
the area of a parallelogram is base x height |
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opposite sides and adjacent angles are equal |
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a parallelogram is a quadrilateral |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).
Simplify 6a x 5b.
| 30\( \frac{b}{a} \) | |
| 11ab | |
| 30ab | |
| 30\( \frac{a}{b} \) |
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.
6a x 5b = (6 x 5) (a x b) = 30ab
The formula for the area of a circle is which of the following?
a = π r |
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a = π r2 |
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a = π d2 |
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a = 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.