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Eddi Din [679]
4 years ago
9

Please answer right away

Mathematics
1 answer:
chubhunter [2.5K]4 years ago
5 0

Answer:

The third alternative is correct

Step-by-step explanation:

In hypothesis testing, the null hypothesis H0 is the hypothesis of no difference and as such it always contains an equality sign. The equality sign could be either of the following alternatives;

=, equal to

≤, less than or equal to

≥, greater than or equal to

In the question presented the claim is that students who practice taking all of their regular tests on the computer will do better on the state's final exam than the students taking their regular tests by paper and pencil.  

This implies that the average on the state exam of students using paper and pencil tests is less than the average of the students using computer tests. Since the null hypothesis must contain an equality sign, the third alternative becomes our null hypothesis, H0.

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47% as a fraction in simplest form
oksian1 [2.3K]

Answer:

Alright is you just want the Answer then the Answer is

0.47 Hope this help's :)

Step-by-step explanation:

If you want i can explain with more detail.

4 0
3 years ago
A comic book cost 3.99 it is marked up to 45% what is the final prices of the comic book after it is marked up ?
wolverine [178]

Answer:

Your answer will be C. $5.79.

Step-by-step explanation:

To get this answer, you have to take the original price (3.99) and multiply it by the mark up (45%)

3.99x0.45=1.79

Then, you add 3.99 and 1.79 to get your final answer.

3.99 + 1.79 = 5.78

The answer is off by one penny, BUT, it's tricky to get it exact when you're working with decimals and percentages.

8 0
3 years ago
Which ordered pair is a solution of the equation -3+5y=2x+3y ?
Oksana_A [137]

Answer: x = y + −3/2

Step-by-step explanation:

Let's solve for x.

−3+5y=2x+3y

Step 1: Flip the equation.

2x+3y=5y−3

Step 2: Add -3y to both sides.

2x+3y+−3y=5y−3+−3y

2x=2y−3

Step 3: Divide both sides by 2.

2x/2 = 2y - 3/2

ANSWER: x = y + -3/2

8 0
3 years ago
The top of the Boulder Dam has an angle of elevation of 1.2 radians from a point on the Colorado River. Measuring the angle of e
Nana76 [90]

Answer:

382.925 feets

Step-by-step explanation:

The solution diagram is attached below :

Converting radian measurement to degree :

radian angle * 180/π = degree angle

1.2 * 180/π = 68.755°

0.9 * 180/π = 51.566°

Height of dam is h:

Using trigonometry :

Tan θ = opposite / Adjacent

Tan 68.755° = h / x

h = x Tan 68.755° - - - (1)

Tan 51.566° = h / (155+x)

h = (155+x) tan 51.566° - - - (2)

Equate (1) and (2)

x Tan 68.755 = (155+x) Tan 51.566

x Tan 68.755 = 155tan 51.566 + x tan 51.566

x Tan 68.755 = 195.32311 + x Tan 51.566

x Tan 68.755 - x Tan 51.566 = 195.32311

x(tan 68.755 - tan 51.566) = 195.32311

x * 1.3120110 = 195.32311

1.3120110x = 195.32311

x = 195.32311 / 1.3120110

x = 148.87307

Using :

h = x Tan 68.755

h = 148.87307 * tan(68.755)

h = 382.92539

h = 382.925 feets

5 0
3 years ago
A dog groomer earns $450 each week plus $8 per dog she washes. She uses the expression 450 + 8d to find her total earnings each
Rudik [331]

Answer:

Step-by-step explanation:

$8 dollars per dog + $450

8 dogs washed so 8*8 for money earned for washing dogs

450 + 8d = 450 + (8 * 8) = 450 + 64 = she earned $514 dollars lase week

7 0
3 years ago
Read 2 more answers
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