Answer:
the answer is in the picture
A quadratic equation always has exactly two solutions. If the quadratic
expression is a perfect square, then they're both the same solution.
Answer:
Number 1 and Number 4
Step-by-step explanation:
By factoring, you can figure out the roots (x = -2 or x = 2)...
1. x^2 - 4 = 0
--> (x + 2)(x - 2) = 0
--> x = -2, x = 2
2. x^2 + 4 = 0
--> factors weirdly, so I won't write it. You'd have to use the quadratic formula.
3. 3x^2 + 12 = 0
--> 3 (x^2 + 4) = 0
--> factors weirdly (same as above)
4. 4x^2 - 16 = 0
--> 4 (x^2 - 4) = 0
--> 4 (x+2) (x-2) = 0
--> x = -2, x = 2
5. 2 (x-2) 2 = 0
--> x = 2
Answer:
1)Reject H_o if t> 2.998
2) t = 2.8594
3) No, conclusion about positive association in population is not reasonable
Step-by-step explanation:
To Test
we know that Test statics is
1) Reject H_o if
n = 9,
Reject H_o if t> 2.998
2)
n = 9 r = 0.734
so we have t = 2.8594
3) t = 2.8594
therefore , hence we accept hypothesis or H_o
No, conclusion about positive association in population is not reasonable