| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.68 |
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Find the value of b:
3b + y = 5
4b + 5y = -7
| \(\frac{4}{5}\) | |
| -\(\frac{11}{17}\) | |
| 1\(\frac{2}{5}\) | |
| 2\(\frac{10}{11}\) |
You need to find the value of b so solve the first equation in terms of y:
3b + y = 5
y = 5 - 3b
then substitute the result (5 - 3b) into the second equation:
4b + 5(5 - 3b) = -7
4b + (5 x 5) + (5 x -3b) = -7
4b + 25 - 15b = -7
4b - 15b = -7 - 25
-11b = -32
b = \( \frac{-32}{-11} \)
b = 2\(\frac{10}{11}\)
If AD = 24 and BD = 17, AB = ?
| 14 | |
| 7 | |
| 4 | |
| 15 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDA quadrilateral is a shape with __________ sides.
4 |
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5 |
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3 |
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2 |
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?
a = π r2 |
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a = π d |
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a = π d2 |
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a = π r |
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.
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Inside |
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First |
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Odd |
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Last |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.