A voluntary response sample is always valid.
12 = x² - x
12 - 12 = x² - x - 12
0 = x² - x - 12
x² - x - 12 = 0
x = <u>-(-1) +/- √((-1)² - 4(1)(-12))</u>
2(1)
x = <u>1 +/- √(1 + 48)</u>
2
x = <u>1 +/- √(49)
</u> 2
x = <u>1 +/- 7</u>
2
x = 0.5 +/- 3.5
x = 0.5 + 3.5 x = 0.5 - 3.5
x = 4 x = -3
<u />
Answer:
Step-by-step explanation:
A conditional statement is in the form of:
- If P then Q, where P - hypothesis and Q- conclusion
<h3>#12</h3>
- Underlined portion is P part, therefore is b. Hypothesis
<h3>#13</h3>
- Underlined portion is Q part, therefore is a. Conclusion
<h3>#14</h3>
A quadrilateral is a figure with four sides.
We put this statement into "if P then Q" format. We consider the quadrilateral is a figure and it has four sides.
- If a figure is quadrilateral, then it has four sides.
Correct choice is b