Answer:
r =9
Step-by-step explanation:
7r-r=54
Combine like terms
6r = 54
6r/6 = 54/6
r =9
Answer:
128
Step-by-step explanation:
from A to C it's 128 degrees i'm not really good with this stuff so sorry if it's not right
Answer:
0.2005
Step-by-step explanation:
Mean, m = 65000
Standard deviation, σ= 7000
Sample size, n = 25
Let X = random variable of salary
Recall:
Z = (μ - x) /(σ/√n)
P(62500 ≤ x ≤ 64000) =?
Pr((65000 - 62500)/7000/√25 ≤ z ≤ (65000 - 64000) / 7000/√25)
P(2500 / 1400 ≤ z ≤ 1000/1400)
P = (1.79 ≤ z ≤ 0.714)
Using the normal distribution table or a Z probability calculator
0.4633 - 0.2624
= 0.2009
Therefore, the answer is 1) y = 2x - 6
2x +6x = 8x
6-1 = 5
8x+5 is the answer