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3 years ago

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Mathematics

1 answer:

Xelga [282]3 years ago

6 0

Repair the question and Add a picture so I can understand a the problem more

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Please awnser this is due in the morning

Anna007 [38]

where is the question

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3 years ago

Find the constant of variation k for the direct variation

Alla [95]

Answer:

The constant of variation is k = -2 ⇒ (B)

Step-by-step explanation:

The equation of the direct variation is y = k x, where

k is the constant of variation

The constant of variation k = $\frac{y}{x}$

The given table has 4 points (-1, 2), (0, 0), (2, -4), (5, -10)

We can use one of the points <em>[except point (0, 0)]</em> to find the value of k

∵ (-1, 2) is a given point

∴ x = -1 and y = 2

∵ k = $\frac{y}{x}$

→ Substitute the values of x and y in the relation above

∴ k = $\frac{2}{-1}$

∴ k = -2

The constant of variation is k = -2

7 0

4 years ago

Answer these five journal problems with the same 3 questions for each problem.

vichka [17]

Answer:

Step-by-step explanation:

8 0

3 years ago

n=400 people under the age of 25 was asked whether they check social media sites right after they wake up. 42% check social medi

Aliun [14]

Answer:

Step-by-step explanation:

We would set up the hypothesis test.

For the null hypothesis,

p = 0.5

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,

P = 42/100 = 0.42

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

n = 400

z = (0.42 - 0.5)/√(0.5 × 0.5)/400 = - 3.2

Recall, population proportion, p = 0.5

We want the area to the left of 0.5 since the alternative hypothesis is lesser than 0.5. Therefore, from the normal distribution table, the probability of getting a proportion < 0.5 is 0.00069

So p value = 0.00069

Since alpha, 0.05 > than the p value, 0.00069, then we would reject the null hypothesis.

Therefore, there is significant evidence to conclude that that less than 50% of people under the age of 25 check social media sites right after they wake up.

7 0

3 years ago

Bill is making a garden that is twice as long as it is wide.

Cloud [144]

Answer:

The equation that best represent the situation is;

x^2 = 576

or x^2 -576 = 0

Step-by-step explanation:

Here, we want an equation that best represent the given information in the question.

The length of the garden is twice as long as it is wide

So, given that x is the length of the garden, then x/2 will represent the width of the garden

From the description given in the question, the garden would be rectangular in shape.

Mathematically, the area of a rectangle can be calculated using the formula;

L * B = area

Thus;

x * x/2 = 288

x*2 = 2 * 288

x^2 = 576

5 0

3 years ago