Answer: The slope is 
Step-by-step explanation:
1. You need to apply the following formula for calculate the slope:
2. Given the points, (3,-4) and (7,6), you have:
3. Substitute these values into the formula for calculate the slope, as following:
4. Simplify the result. Therefore, you obtain that the slope is:
Answer:
12 is the answer
Step-by-step explanation:
I just know the answer
Step-by-step explanation:
4x2 - 25b2
We can solve it by the squares so
(2x - 5b) (2x + 5b)
2) x2 - 81
The same case is here so
(x - 9) (x + 9)
Answer:
(130.08, 139.92)
Step-by-step explanation:
Given that:
Mean (m) = 135
Standard deviation (σ) = 30
Sample size (n) = 100
α = 90%
The confidence interval value is obtained using the relation:
Mean ± Zcritical * (standard deviation / sqrt(n))
Zcritical at 90% = 1.64
standard deviation / sqrt(n) = 30 / sqrt(100)
= 30 / 10 = 3
Hence,
135 ± 1.64 * (3)
Lower limit : 135 - (1.64 * 3) = 130.08
Upper limit : 135 + (1.64 * 3) = 139.92
Hence,
Confidence interval = (130.08, 139.92)
Answer: 12.6
Step-by-step explanation:
