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rusak2 [61]
3 years ago
9

Evaluate 15+ (29-13)=

Mathematics
1 answer:
leonid [27]3 years ago
6 0
The answer is 31
29 - 13 is 16
16 + 15 is 31
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State whether each situation has independent or paired​ (dependent) samples. a. A researcher wants to compare the hand–eye coord
Alex73 [517]

Answer:

a. A researcher wants to compare the hand–eye coordination of men and women. She finds a random sample of 100 men and 100 ​women, and measures their hand–eye coordination = paired samples

b. A researcher wants to know whether professors with tenure have fewer office hours than professors without tenure. She observes the number of office hours for professors with and without tenure. =  independent samples

Explanation:

Paired-samples t tests compare scores on two different variables but for the same group of cases; independent-samples t tests compare scores on the same variable but for two different groups of cases.

6 0
3 years ago
Hello everyone (this is 6th grade math)​
PtichkaEL [24]

Answer:

7 batches

Step-by-step explanation:

4 0
3 years ago
the hypotonuse of a right triangle measures 15cm and one of its legs meauseres 8cm find the measure of the other leg
Elza [17]

Answer:

12.6 cm

Step-by-step explanation:

(other leg)² = (15)² - (8)²

(other leg)² = 225 - 64

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8 0
2 years ago
Read 2 more answers
E) Over a season a football team won, drew and lost matches in the ratio 2:1:5.
IRISSAK [1]

Answer:  4 ties or draws

8 wins, 4 ties, 20 losses

===========================================================

Explanation:

The ratio 2:1:5 is of the format wins:ties:losses where getting a draw is the same as getting a tie.

So one possibility is that they won 2 matches, tied once, and lost 5 matches. The only problem is that it doesn't fit with the statement that "The team lost 12 more matches than they won."

We could guess-and-check our way to the answer, but I think using algebra is the most efficient route.

----------

Let x = number of ties

2x = number of wins and 5x = number of losses

Note the ratio 2x:x:5x reduces to 2:1:5 after dividing everything by x.

Since the team lost 12 more matches than they won, this means,

loss count = (win count) + 12

5x = (2x) + 12

5x-2x = 12

3x = 12

x = 12/3

x = 4

The team tied 4 times and has 2x = 2*4 = 8 wins and 5x = 5*4 = 20 losses.

The ratio 8:4:20 reduces to 2:1:5 when you divide all parts by the GCF 4.

Also, the gap between 8 wins and 20 losses is 20-8 = 12 to help fully confirm we have the correct answer.

8 0
2 years ago
What is the range of the function f(x) = -(x + 3)2 + 7?
IrinaK [193]

Answer: b

Step-by-step explanation:

5 0
3 years ago
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