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Blizzard [7]
3 years ago
10

Simplify the polynomial: 2x^2+8-4x+3x-6x^2+7

Mathematics
1 answer:
SpyIntel [72]3 years ago
5 0
(2x^2 - 6x^2) - (4x + 3x) + (8 + 7)
= -4x^2 - 1x + 15
= -4x^2 - x + 15
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The city council is considering a law that would ban smoking in all public facilities. A sample has been selected from the commu
lisov135 [29]

Answer:

Reject Null Hypothesis given that  P-value < ∝

Step-by-step explanation:

Applying the Five ( 5 ) step model and assuming ∝ = 0.05

First step : determine the Null hypothesis

H0 : Age and support for Anti-smoking = independent

Second step : Determine the alternate hypothesis

Ha : Age and support for Anti-smoking ≠ independent

Thirdly : Identify significance level ( ∝ ) = 0.05

4th step : Calculate the Test statistic and P-value

Chi-squared test = 36.1429 using excel function

P-value =  1 - CHISQ.DIST(36.1429, 1, TRUE)  < 0.0001

finally : we can conclude that Age and support for Anti -smoking are not Independent hence we Reject The Null hypothesis. Given that

P-value < ∝

3 0
3 years ago
Solve for the unknown in the equation <br> 3(x-1)=21
dimaraw [331]

Answer:

6

Step-by-step explanation:

The main idea of how to solve it is to isolate the variable. Whatever you multiply, divide, add, or subtract on one side, you must do the same to the other side so that both sides are equal.

3(x-1) = 21

3(x-1) / 3 = 21 / 3

x - 1 = 7

  + 1 + 1

x = 6

6 0
3 years ago
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The mean is defined as the
Tema [17]
Is the average<span> of the numbers: a calculated "central" value of a set of numbers. To calculate: Just add up all the numbers, then divide by how many numbers there are.</span>
7 0
4 years ago
If y varies inversely as x and y is 6 when x is 12, what is x when y is 14. 4? a. 5 b. 0. 4 c. 9. 6 d. 2. 5.
krok68 [10]

The value of x when y is 14.4 is 5.

It is given that

y ∝ 1/x

y = k/x....(1)

Where k is a constant of proportionality

<h3>What is the constant of proportionality?</h3>

The constant of proportionality is the ratio that relates two given values.

When y =6, x=12

Means, 6 = k/12

k = 72

Putting the value of k in equation (1)

y = 72/ x

14.4 = 72/ x

x = 5

Therefore, The value of x when y is 14.4 is 5.

To get more about the constant of proportionality visit:

brainly.com/question/1835116

8 0
2 years ago
Josh can walk 4 miles in 1 hour. How many miles can he walk in 3 hours
bulgar [2K]
Im pretty sure it’s 12 miles, hope this helped :)
8 0
3 years ago
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