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gregori [183]
3 years ago
15

I'LL MARK BRAINLIEST. thanks​

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
6 0

Answer:

Bro resend your question with image

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Which of the sets of ordered pairs represents a function?
Bumek [7]
C, nether of the problems have any repeating coords.
8 0
3 years ago
Read 2 more answers
If x = -6, which inequality is true?
ziro4ka [17]

Answer:

1-2x>13

Step-by-step explanation:

1-2x>13

-2x>13-1

-2x>12

x>-12/2

x<-6

7 0
2 years ago
Two coworkers commute from the same building. They are interested in whether or not there is any variation in the time it takes
jenyasd209 [6]

Answer:

Step-by-step explanation:

Hello!

You have two samples.

Sample 1 (time that takes one commute of worker 1)

n₁= 20

S₁²= 12.2

Sample 2 (time that takes one commute of worker 2)

n₂= 20

S₂²= 16.9

The hypothesis is that the first coworker is more consistent with his commute times, this means that the variability of his commute times is less than the variability of the commute times of worker 2. With this in mind, the hypothesis for a variance ratio test is:

H₀: σ₁² ≥ σ₂²

H₁:: σ₁² < σ₂²

α: 0.10

The statistic for this test is:

F= (S₁²/S₂²) * (σ₁²/σ₂²) ~ F_{n1-1;n2-1}

The test is one-tailed (left) with just one critical value:

F_{n_1-1;n_2-1;\alpha } = \frac{1}{F_{n_2-1;n_1-1;1-\alpha }} = \frac{1}{F_{19;19;0.90}} = \frac{1}{1.82} =0.549

(The F-table I use only has the values for high probabilities so I've used a conversion method to obtain the value for the small probability)

Your decision rule is:

If F ≤ 0.549, you reject the null hypothesis.

if F > 0.549, you support the null hypothesis.

The calculated value:

F= (S₁²/S₂²) * (σ₁²/σ₂²) = (12.2/16.9) * 1= 0.722

Since the calculated F-value is greater than the critical value, the decision is to not reject the null hypothesis. So you can say that the variability of the commute times of worker 1 is less than the variability of the commute times of worker 2.

I hope you have a SUPER day!

7 0
3 years ago
A store sells coats and umbrellas. On Monday, the store sells 7 coats and 12 umbrellas for a total of $399.45. On
laiz [17]

Answer:

28.35

Step-by-step explanation:

Let cost of 1 coat = c.

Let cost of 1 umbrella = u.

7c + 12u = 399.45;

3c + 25u = 503.80

Multiply both sides of the first equation by 25.

Multiply both sides of the second equation by 12.

175c + 300u = 9986.25

36c + 300u = 6045.6

Subtract the second equation from the first equation eliminating u. Then solve for c.

139c = 3940.65

c = 28.35

Answer: A coat costs $28.35.

3 0
1 year ago
If Mrs. Hamm divides 7 pounds of potting soil equally into three flower pots, what is the weight of potting soil in one flower p
Leno4ka [110]

The weight of potting soil in one flower pot is 7/3 pounds or 2.34 pounds option (B) is correct.

<h3>What is a fraction?</h3>

Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.

We have total weight of the potting soil = 7 pounds

It is divided equally into three flower pots.

So each pot contains = 7/3 potting soil

Thus, the weight of potting soil in one flower pot is 7/3 pounds or 2.34 pounds option (B) is correct.

Learn more about the fraction here:

brainly.com/question/1301963

#SPJ1

5 0
1 year ago
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