Answer: B
Step-by-step explanation: I got it right.
Answer:
-15
Step-by-step explanation:
-3(2)2-4(2)+5
-12-8+5
-20+5
5-20= -15
Step-by-step explanation:
I think these is your correct answer .
Answer:
Josh's solution is NOT correct.
Step-by-step explanation:
Josh's solution is NOT correct.
x^2 - 6x - 7 = 0
As you know:
-7 = (-7) * (+1) and -6 = (-7) + (+1) = -6
So factor x^2 - 6x - 7 = 0, you have
(x - 7)(x + 1) = 0
Set each factor = 0 to solve the equation
x - 7 = 0; x = 7
x + 1 = 0; x = -1
Solutions: x = -1 and x = 7
So Josh's solution is NOT correct.
Answer:
The probability that the temperature on a given day in February is 22º or lower is 16.7 %
Step-by-step explanation:
Given:
Average Temperature,
Standard Deviation of Temperature, [tex\sigma=8.5^{\circ}[/tex]
We have to find: Probability that the temperature is 22° or lower
.i.e., P[ X ≤ 22 ]
Let X be the Temperature on a given day in February.
We use Z-score to calculate required probability.
First we convert X into Z using this relationship,
Now, Probability [ Z ≤ -0.965 ] = 0.167272 = 16.7 %
Therefore, The probability that the temperature on a given day in February is 22º or lower is 16.7 %