| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Last |
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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.
Solve for x:
x2 + 3x - 4 = 0
| 9 or 4 | |
| 1 or -4 | |
| 6 or 2 | |
| 1 or -5 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
x2 + 3x - 4 = 0
(x - 1)(x + 4) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (x - 1) or (x + 4) must equal zero:
If (x - 1) = 0, x must equal 1
If (x + 4) = 0, x must equal -4
So the solution is that x = 1 or -4
If side x = 15cm, side y = 8cm, and side z = 9cm what is the perimeter of this triangle?
| 32cm | |
| 30cm | |
| 26cm | |
| 31cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 15cm + 8cm + 9cm = 32cm
The dimensions of this cylinder are height (h) = 8 and radius (r) = 3. What is the surface area?
| 154π | |
| 90π | |
| 66π | |
| 6π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(32) + 2π(3 x 8)
sa = 2π(9) + 2π(24)
sa = (2 x 9)π + (2 x 24)π
sa = 18π + 48π
sa = 66π
For this diagram, the Pythagorean theorem states that b2 = ?
c2 - a2 |
|
a2 - c2 |
|
c2 + a2 |
|
c - a |
The Pythagorean theorem defines the relationship between the side lengths of a right triangle. The length of the hypotenuse squared (c2) is equal to the sum of the two perpendicular sides squared (a2 + b2): c2 = a2 + b2 or, solved for c, \(c = \sqrt{a + b}\)