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Nutka1998 [239]
3 years ago
9

how many solutions does this equation have ? 9z + 10 = 1 – 15 + 3z A. no solutions B. infinitely many solutions C. one solution

D. no solutions
Mathematics
1 answer:
PIT_PIT [208]3 years ago
6 0

Answer:

C. One solution

Step-by-step explanation:

9z+10=1-15+3z

9z+10=-14+3z

6z+10=-14

6z=-24

z=-4

C. One solution

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Which set of number are right for this inequality x<14 plz help me i need help due in 20 min
kiruha [24]

Answer:

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Step-by-step explanation:

3 0
3 years ago
A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test. What is
BigorU [14]

Answer:

29.5+/-1.11

= ( 28.39, 30.61)

Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 29.5

Standard deviation r = 5.2

Number of samples n = 59

Confidence interval = 90%

z-value (at 90% confidence) = 1.645

Substituting the values we have;

29.5+/-1.645(5.2/√59)

29.5+/-1.645(0.676982337100)

29.5+/-1.113635944529

29.5+/-1.11

= ( 28.39, 30.61)

Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)

4 0
3 years ago
Jennifer earns $7.60 per hour working after school. She wants to buy a musical instrument and she needs at least $500. Write an
slega [8]

Answer:

Step-by-step explanation:

let h be the number of hours.

7.60 h≥ 500

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Which of the following could be the lengths of the sides of a 45°-45°-90° triangle?
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5 0
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Read 2 more answers
Find the area of shaded region.
Rudiy27

Hey there mate ;),

Area of The shades region is <u>3098 m^2</u>

The solution is attached as picture. Please check.

<em>Answered</em><em> </em><em>by</em><em> </em><em>Benjemin</em>

6 0
2 years ago
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