| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
Solve for y:
2y - 4 > \( \frac{y}{-7} \)
| y > 1\(\frac{13}{15}\) | |
| y > -\(\frac{10}{13}\) | |
| y > -1 | |
| y > -1\(\frac{1}{11}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
2y - 4 > \( \frac{y}{-7} \)
-7 x (2y - 4) > y
(-7 x 2y) + (-7 x -4) > y
-14y + 28 > y
-14y + 28 - y > 0
-14y - y > -28
-15y > -28
y > \( \frac{-28}{-15} \)
y > 1\(\frac{13}{15}\)
The formula for the area of a circle is which of the following?
a = π r |
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a = π d |
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a = π d2 |
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a = π r2 |
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.
Which of the following expressions contains exactly two terms?
polynomial |
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binomial |
|
monomial |
|
quadratic |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
A coordinate grid is composed of which of the following?
all of these |
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x-axis |
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origin |
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y-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.
The dimensions of this cylinder are height (h) = 8 and radius (r) = 5. What is the surface area?
| 44π | |
| 130π | |
| 18π | |
| 48π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(52) + 2π(5 x 8)
sa = 2π(25) + 2π(40)
sa = (2 x 25)π + (2 x 40)π
sa = 50π + 80π
sa = 130π