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Natasha2012 [34]
3 years ago
12

The system y = 2x + 3 and y = 2x − 1 has how many solutions

Mathematics
2 answers:
Vlada [557]3 years ago
5 0
It has no solutions. Two parallel lines never intersect.
julia-pushkina [17]3 years ago
5 0

Answer:

No solution.

Step-by-step explanation:

Because they both equal y, we can make them equal to each other.

2x + 3 = 2x - 1

If we were to subtract 2x on both sides, then we would be left with this.

3 ≠ -1

As you probably know, 3 is not the same as -1.

This means these systems have no solutions.

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Mice21 [21]

the graph is incorrect, he shouldve shaded to the right, hope this helps

6 0
3 years ago
What is the range of the function f(x) = -4|x + 1| − 5?
Nat2105 [25]

Answer:

f(x) ≤ -5

Step-by-step explanation:

5 0
3 years ago
A supplier of a certain car parts chain of stores wants to estimate the average length of time car owners plan to keep their car
____ [38]

Answer:

The 99% confidence interval for the average length of time all car owners plan to keep their cars is between 3.85 years and 10.55 years.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 2.575*\frac{6.5}{\sqrt{25}} = 3.35

The lower end of the interval is the sample mean subtracted by M. So it is 7.2 - 3.35 = 3.85 years

The upper end of the interval is the sample mean added to M. So it is 7.2 + 3.35 = 10.55 years

The 99% confidence interval for the average length of time all car owners plan to keep their cars is between 3.85 years and 10.55 years.

7 0
3 years ago
9)
madreJ [45]

Answer:

the answer is A.

Step-by-step explanation:

to get the you would use the distributive property to multiple the 4 by the two term in the parentheses.

3 0
3 years ago
Read 2 more answers
Stock prices: Following are the closing prices for a certain stock during June and July of a certain year.
yKpoI14uk [10]
I attached a photo
Hope this helps ʕ•ᴥ•ʔ
Just zoom in, couldn’t attached 2 photos

5 0
3 years ago
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