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Pie
3 years ago
6

a sample of 100 pregnancies were found to take an average of 267 days. the population deviation is known to be 13 days. find a 9

0% confidence interval for the true population mean.
Mathematics
1 answer:
marin [14]3 years ago
4 0
Don’t know I’m just answering thus because it doesn’t let me ask a question unless I answer a random question. Sorry
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Y=4x-1 y=2x-5 solve by substitution
Alenkasestr [34]

Answer:

Step-by-step explanation:

4x-1= 2x-5

4x-2x= 1-5

2x=-4

x= -2

8 0
3 years ago
Combining transformations result in interesting designs.<br><br> true<br> false
Nadya [2.5K]
True

because many thing who giv wonderful things
4 0
4 years ago
Mark McGuire hit 70 home runs in the 1998 season. Given that there are 4 bases &amp; 90 feet between each base, how many miles d
alekssr [168]

Answer:

4.8 or about 5 miles

Step-by-step explanation:

In order to solve this problem, you must first multiply the 4 bases × 90 feet to get how much feet he runs in 1 home run. 4 × 90= 360 feet. Then you must multiply 360 feet × 70 homeruns, this will give you how many feet he ran in 70 homeruns. Your answer will be 25,200 feet. Now, there are 5,280 feet in <em>one</em> mile, so you must divide 25,200 by 5,280. Using a calculator, my answer was 4.7727272727. I then rounded it up to 4.8 miles, or about 5 miles.

6 0
4 years ago
Combining like terms 2x+4=15+x
vodomira [7]

Answer:

3x+19

Step-by-step explanation:

2x are like terms and 4 and 15 are like terms so you add them together

7 0
3 years ago
Read 2 more answers
A chicken weighs t lbs. It needs to be cooked for 20 minutes per lb plus an extra 15 minutes. What is the total cooking time? Is
Nostrana [21]

Answer:

Total cooking time = 20t + 15

The expression 15t + 20 is wrong.

Step-by-step explanation:

weight of chicken = t lbs

cook time per lb = 20 minutes

This means that:

1 lb weight requires a cooking time of 20 minutes

1 lb = 20 minutes

∴ t lbs = 20 × t = 20t minutes.

We were also told that each chicken required an extra cooking time of 15 minutes, in addition to the total cooking time due to the weight. Therefore, the total cooking time is calculated thus:

Total cooking time = cooking time due to weight + 15 minutes

Total cooking time = 20t + 15

Hence the expression 15t + 20 is wrong, due to the explanation given above.

8 0
3 years ago
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