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Westkost [7]
3 years ago
15

Use the Commutative Property to write an expression equivalent to –5d + 1/2.

Mathematics
2 answers:
Jet001 [13]3 years ago
7 0

Answer: 12-5d

because all you do is flip the expression

soldi70 [24.7K]3 years ago
4 0

Answer:

I believe it is 1/2 - 5d  

Step-by-step explanation:

Hope this helps! gl :)

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A resercher is wondering whehter the drinking habits of adults in a certain region of the country are in the same proportion as
Andrews [41]

Answer:

Answer for the question :

A resercher is wondering whehter the drinking habits of adults in a certain region of the country are in the same proportion as the general population of adults. Suppose a recent study stated that the proportion of adults who reported drinking once a week or less in the last month was 0.26. The researcher's null hypothesis for this test is H0: P=0.26 and the alternative hypothesis is Ha; P> 0.26. The researcher collected datat from a random sample of 75 adults in the region of interest.

1- Verify that the normality assumption is satisfied. Describe each separately.

2- To cotinue the study into the drinking habits of adults, the researcher decides to collect datat from adults working in "blue collar" jobs to see whether their drinking habits are in the same proportion as the general public. The null hypothesis for this test is H0: P=0.26 and the alternative hypothesis is Ha: P>0.26. The researcher computer the test statistic to be 1.59. Draw a graph of z distribution, label the test statistic and shade the p-value associated with this test statistic."

is given in the attachment.

Step-by-step explanation:

3 0
4 years ago
4. Kevin can clean a large aquarium tank in about 9 hours. When Kevin and Lara
Galina-37 [17]

Answer:

Part A

The rational equation that can be used to determine how long it would take Lara to clean the tank alone is; 6/9 + 6/x = 1

Part B

It would take Lara 18 hours to clean the tank if she works by herself

Step-by-step explanation:

Part A

The time it takes Kevin to clean an aquarium tank alone = 9 hours

The time it takes Kevin and Lara to clean the tank together = 6 hours

Let '1/x' represent Lara's cleaning rate, we have;

The time it would take Lara to clean 1 tank alone = 1/(1/x) = x

Kevin's cleaning rate, y = 1/9 tank per hour

The number of tanks, z =  tank

The total time it takes both of them to clean the tank, t = 6 hours

Therefore, we get;

t × y + t × 1/x = z

When t = 6, y = 1/9, and z = 1, we get;

6 × (1/9) + 6·(1/x) = 1

Therefore, the rational equation that can be used to determine how long it would take Lara to clean the tank if she work by herself, '1/x', is given as follows;

6/9 + 6·(1/x) = 1

6/9 + 6/x = 1

Part B

Solving the rational equation gives;

1/x = (1 - 6/9)/6 = 1/18

∴ 1/x = 1/18)

∴ x = 18

The time it would take Lara to clean the tank if she worked by herself, x = 18 hours

6 0
3 years ago
Slope = - 9/5 y = - 5
Art [367]
(x,y) if proportional coordinates
(0,0)
(5,9)
(10,18)
linear goes on forever so endless coordinates
3 0
3 years ago
Plz help, just look at the picture ​
motikmotik

Answer:

<2, <3, <4

Step-by-step explanation:

You have parallel lines cut by a transversal, so alternate interior angles are congruent. Also, alternate exterior angles are congruent. Corresponding angles are congruent.

Vertical angles are always congruent.

I'll write each congruent angle and the reason.

<2, vertical

<3, corresponding

<4, alternate exterior angle

7 0
3 years ago
A line passes through the points (-6, 4) and (-2, 2). Which is the equation of the line?
MissTica

Answer:

28

Step-by-step explanation:

7 0
3 years ago
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