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Romashka-Z-Leto [24]
3 years ago
5

Teachers are being trained to standardized the scores they give to students' essays. The same essay was scored by 10 different t

eachers at the beginning and at the end of their training. The results are shown in the tables.

Mathematics
1 answer:
evablogger [386]3 years ago
5 0
What do you want solved?
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Simplify the expression. [2×(10+5)]-5
svetlana [45]
<span>[2×(10+5)]-5
[2*15]-5
30-5
25</span>
3 0
3 years ago
The mayor of a town has proposed a plan for the annexation of an adjoining bridge. A political study took a sample of 1500 voter
Nadusha1986 [10]

Answer:

p-value of the statistics = 0.0096

Step-by-step explanation:

Given - The mayor of a town has proposed a plan for the annexation of an adjoining bridge. A political study took a sample of 1500 voters in the town and found that 47% of the residents favored annexation. Using the data, a political strategist wants to test the claim that the percentage of residents who favor annexation is above 44%.

To find - Determine the P-value of the test statistic.

Proof -

Given that,

H0 : p = 0.44

Ha : p > 0.44

Now,

Test Statistics is

z = (p bar - p)/ sqrt(p(1-p)/n)

  = (0.47 - 0.44) / sqrt(0.44(1-0.44)/1500)

  = 2.34

⇒z = 2.34

So,

p-value = P(Z > z)

             = P(Z > 2.34)

             = 0.0096

⇒p-value = 0.0096

7 0
3 years ago
What expression is equivalent to -7(5a)
Aneli [31]

Answer:

-35a

Step-by-step explanation:

Here, you just distribute: -7 * 5a

= -35a

7 0
3 years ago
12 cos theta minus 16 sin theta is equal to zero find 2 sin theta + cos theta​
gayaneshka [121]

Answer:

2sinθ + cosθ = 2

Step-by-step explanation:

12 cos θ - 16 sinθ = 0

=> 3 cos θ -4 sin θ = 0

=> tanθ = 3/4

let P = 3x

B = 4x

=> H= 5x

=> sinθ = P/H = 3/5

cosθ = B/H = 4/5

2sinθ + cosθ

= 2× 3/5 + 4/5

= 6/5+4/5

= 10/5

= 2

=> 2sinθ + cosθ = 2

5 0
3 years ago
Read 2 more answers
Thomas buys a cardboard sheet that is 8 by 12 inches. Let x be the side length of each cutout. Create an equation for the volume
Alekssandra [29.7K]
Answer: Your equation would be y = x(12 - 2x)(8 - 2x).

The volume of a rectangular prism is V = LWH. The initial length and width are given as 12 and 8, however that makes the height 0.

If we cut out the corners, they would be the length of x. When we cut out the corners, we are subtract the length x from both ends of the length and width.

So now our measurements are:
Length: 12 - 2x
Side: 8 - 2x
Height: x

Multiply them altogether and you have your equation. Then, you can use your equation to find any measurements that you need.
4 0
4 years ago
Read 2 more answers
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