3 years ago

After I substitute in y how do I determine the coordinate(s)?

Mathematics

1 answer:

klasskru [66]3 years ago

6 0

Simplifying both sides of the equation then isolating the variable

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Unit Test Review Active x 1 2 3 4 5 이 6 7 8 9 o 이 10 Which answer explains whether the table of values represents a function? Х

Eduardwww [97]

Answer:

no the values do not

Step-by-step explanation:

3 0

3 years ago

3. If x = 12 which equation is true? 7.11B

galina1969 [7]

Answer:

Step-by-step explanation:

evaluate each

3(20-12)=48

3(8)=48

24=48 FALSE

3(12-12)=3

3(0)=3

0=3 FALSE

2(12-3)=18

2(9)=18

18=18 TRUE

5(12)-3=58

60-3=58

57=58 FALSE

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3 years ago

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22-3(4)<br> How do I answer this question?

Ulleksa [173]

Answer:

Step-by-step explanation:

22-3=19

19x4=76

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2 years ago

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The Highway Safety Department wants to study the driving habits of individuals. A sample of 40 cars traveling on a particular st

Ipatiy [6.2K]

Answer:

We need a sample size of at least 101

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.

What sample size is needed to estimate the true average speed to within 2 mph at 99% confidence?

We need a sample of at least n.

n is found when M = 2. So

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

$2 = 2.575*\frac{7.8}{\sqrt{n}}$

$2\sqrt{n} = 2.575*7.8$

$\sqrt{n} = \frac{2.575*7.8}{2}$

$(\sqrt{n})^{2} = (\frac{2.575*7.8}{2})^{2}$

$n = 100.85$

Rounding up

We need a sample size of at least 101

8 0

3 years ago

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Which value of K will make x^2-1/4x+k a perfect square trinomial?

lakkis [162]

To find it it is
ax^2+bx+c
if the first term (a) is 1 then c=b/2
b=-1/4
(-1/4)/2=-1/4 times 1/2=-1/8

k=-1/8

4 0

3 years ago