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2 years ago

Solve the following system: (5 points)

Mathematics

1 answer:

dusya [7]2 years ago

3 0

(4,7) because 3•4 = 12 and 12+7 = 19

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Give the domain and range of the relation. Indicate whether the relation is a function or not.

rewona [7]

D: {0, 1, 2, 3}

R: {−3, −2, 2, 5}

The relation is a function.

That's the answer.

4 0

2 years ago

You're conducting a significance test for H0 : p = .35, Ha : p < .35. In a sample of size 40, you identify a count of 11 succ

nordsb [41]

Answer: c. –1 and .1587

Step-by-step explanation:

As per given , we have

Null hypothesis : $H_0 : p= 0.35$

Alternative hypothesis : $H_1 : p< 0.35$

Since Alternative hypothesis is left-tailed ,so the test must be a left tailed test .

Z -Test statistic for proportion = $z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

, where p= population proportion

$\hat{p}$ = sample proportions

n= Sample size.

Let x be the number of successes.

For n= 40 and x= 11

$\hat{p}=\dfrac{x}{n}=\dfrac{11}{40}=0.275$

Then , $z=\dfrac{0.275-0.35}{\sqrt{\dfrac{0.35(1-0.35)}{40}}}$

$z=\dfrac{-0.075}{\sqrt{0.0056875}}$

$z=\dfrac{-0.075}{0.075415515645}$

$z=-0.99449031619\approx-1$

By using z-table ,

P-value for left-tailed test = P(z<-1)= 1-P(z<1) [∵ P(Z<-z)= 1-P(Z<z) ]

= 1-0.8413

=0.1587

Hence, the -score and P-value are <u>–1 and 0.1587</u> .

So the correct option is c. –1 and .1587

8 0

3 years ago

Which point is 12 units less than point Q?

nadezda [96]

Answer:

Point R

Step-by-step explanation:

Go back 12 points

4 0

3 years ago

1)2 out of 7 students are boys. about what percent of students are boys? please help me with the question it is due tomorrow!!!!

notka56 [123]

The long answer is <span>28.571428%, but I would round it upwards to make it seem more realistic.</span>

8 0

2 years ago

49/10 as a mixed number

anastassius [24]

4 9/10 is your answer because you first have to divide the numerator by the denominator. this will give you 4, with a remainder of 9. The mix number can be created by using the 4 as the whole number, the 9 as the numerator and the 10 as a denominator. So, 49/10 = 4 9/10. Hope this works!

5 0

3 years ago

Read 2 more answers