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kvv77 [185]
3 years ago
8

Help please? Which graph can be used to find the solution(s) to x2 – 1 = x + 1?

Mathematics
2 answers:
Mumz [18]3 years ago
5 0
Basically the graphs represent
y=x^2-1 and y=x+1
and where they intersect are the solutions

so just graph each
y=x+1
that has y intercep at y=1
that is 1st graph, 2nd, and 4th graph

now, we got
y=x^2-1
hmm, at x=0, y=-1
so it can't be first or 2nd one
it has to be the 3rd one
the answer is the 3rd one: https://us-static.z-dn.net/files/d6b/8b369670d3f70b5d375515f82d095327.jpg

klio [65]3 years ago
3 0

Answer:

Option 3rd is correct.

Step-by-step explanation:

We have been given an equation:

x^2-1=x+1

We can see that the graphical method gives the solution by intersection of two graphs.

So, one graph is of parabola open upwards

And the right hand side is the straight line.

Option 1 and 2 are discarded being open downwards.

And Option 3rd is correct.

Intersecting at (-1,0) and (2,3).

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denis-greek [22]
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root 100
you can get 10 from it, or we'll use 5

100/5=20
20/5=4
root 4= 2
because there are 2 "5" we can bring that out of the root, there are 2 "2" so we bring that out too.
When a number is taking out of a root, the 2 exact same numbers become one. in this case, there are ONE 5 and ONE 2 outside the root. then You multiply 5 and 2 together, and you get 10

6 0
3 years ago
In a 3M Privacy Filters poll, 806 adults were asked to identify their favorite seat when they fly, and 492 of them chose a windo
Snowcat [4.5K]

Answer:

Step-by-step explanation:

If majority of adults prefer a window seat when they fly, it means that more than half or more than 0.5 of the population prefer a window seat when they fly.

We would set up the hypothesis test.

For the null hypothesis,

p = 0.45

For the alternative hypothesis,

p > 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

Sample proportion, P = x/n

Where

x = number of success = 492

n = number of samples = 806

P = 492/806 = 0.61

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

z = (0.61 - 0.5)/√(0.5 × 0.5)/806 = 6.24

From the normal distribution table, the p value < 0.00001

Since alpha, 0.01 < than the p value, then we would reject the null hypothesis. Therefore, at a 1% significance level, we can conclude that the majority of adults prefer a window seat when they fly.

8 0
3 years ago
!!!!!!!!!! !!!!!!!!!!!!
jeyben [28]

Answer:

B

Step-by-step explanation:

6.5 * 24 = 156

Therefore B

4 0
2 years ago
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</span>
8 0
3 years ago
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adell [148]
The answer to p is 4
7 0
3 years ago
Read 2 more answers
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