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Ymorist [56]
3 years ago
15

Solve the inequality -×/2 <4

Mathematics
1 answer:
photoshop1234 [79]3 years ago
5 0
Multiply by -2.
x > -8

_____
Multiplying or dividing by a negative number causes the direction of the relationship to change.
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What are the domain and range of the relation (–4, 2), (0, 1), (0, 5), (8, 10)? A.Domain: {–4, 0, 8}; Range: {2, 1, 5, 10} B.Dom
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It is A because the domain is x and range is the y.
8 0
3 years ago
Used DVDs are on sale for a price of 5 for $20. At that price, how much will is cost to buy 12 used DVDs?
Levart [38]
If you reduce the 5 for 20, you will get 1 for $4. Therefore, 12×4 will be the answer ($48)
6 0
3 years ago
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Find the area of the circle. leave your answer in terms is pi.
PilotLPTM [1.2K]

Answer:

9

Step-by-step explanation:

6 0
3 years ago
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The equation of the line in this graph is<br>y= ____ x+____ .<br>​
Alexxx [7]
The equation of the line in this graph is y = 3/2x + 3.

Explanation:

In slope intercept form equations, the initial value is where everything begins. In this equation, that would be at the point (0,3). From there, because it is going up toward the right side, there is a positive slope. The formula for slope is rise over run, so to get our slope, we have to go up 3 units and over 2 units.
3 0
2 years ago
Electricity usage data consists of 45 months has a mean number of units consumed is 390.47 per month with a standard deviation o
neonofarm [45]

Answer:

The 95% confidence interval for the average monthly electricity consumed units is between 47.07 and 733.87

Step-by-step explanation:

We have the standard deviation for the sample. So we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 45 - 1 = 44

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 44 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0141

The margin of error is:

M = T*s = 2.0141*170.5 = 343.4

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 390.47 - 343.40 = 47.07 units per month

The upper end of the interval is the sample mean added to M. So it is 390.47 + 343.40 = 733.87 units per month

The 95% confidence interval for the average monthly electricity consumed units is between 47.07 and 733.87

6 0
3 years ago
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