I think the answer is b I havent done problems like that in like 2 years i hope i helped
Answer:
Step-by-step explanation:
First, simplify the equation they give you
125x+200≥1200 ---------> 125x≥1000---------->x≥8
So, x has to be greater than or equal to 8 which rules out b or d.
So the answers are narrowed down to a and c, the only difference is that the dot in A is filled in whereas the dot in c is not. In math, having a filled in circle means that value is included (≥ sign), so we will choose the answer a.
Answer:
There is enough not evident to support dealer's claim that his sales is no more than $80.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = $80
Sample mean,
= $91
Sample size, n = 20
Alpha, α = 0.05
Sample standard deviation, s = $21
First, we design the null and the alternate hypothesis
We use one-tailed t test to perform this hypothesis.
Formula:

Putting all the values, we have

Now,
Since,
The calculated test statistic is greater than the critical value, we fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.
Conclusion:
There is enough not evident to support dealer's claim that his sales is no more than $80.
Answer:
<h2>A = 145 cm</h2><h2 />
Step-by-step explanation:
total length = 445 cm (A + B + C)
A = 45 + B
B = C/2
find A
A + B + C = AC
(45 + B) + (C/2) + C = 445
45 + C/2 + C/2 + C = 445
2C = 445 - 45
C = 400/2
C = 200
B = 200/2
B = 100
A = 45 + 100
A = 145
proof:
445 = 145 + 100 + 200
445 = 445 ----OK