| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.69 |
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Solve 8c + 2c = 4c + 9x - 5 for c in terms of x.
| 1\(\frac{3}{4}\)x - 1\(\frac{1}{4}\) | |
| \(\frac{1}{4}\)x - \(\frac{3}{4}\) | |
| x - \(\frac{1}{3}\) | |
| -\(\frac{1}{2}\)x + \(\frac{1}{5}\) |
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.
8c + 2x = 4c + 9x - 5
8c = 4c + 9x - 5 - 2x
8c - 4c = 9x - 5 - 2x
4c = 7x - 5
c = \( \frac{7x - 5}{4} \)
c = \( \frac{7x}{4} \) + \( \frac{-5}{4} \)
c = 1\(\frac{3}{4}\)x - 1\(\frac{1}{4}\)
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Last |
|
Inside |
|
Odd |
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First |
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.
What is 4a + 3a?
| 7a | |
| 1 | |
| a2 | |
| 12a |
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.
4a + 3a = 7a
If a = 7, b = 5, c = 6, and d = 8, what is the perimeter of this quadrilateral?
| 21 | |
| 25 | |
| 12 | |
| 26 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 7 + 5 + 6 + 8
p = 26
If a = c = 1, b = d = 4, what is the area of this rectangle?
| 12 | |
| 6 | |
| 36 | |
| 4 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 1 x 4
a = 4