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pickupchik [31]
2 years ago
11

A survey determined that 7/18 of the seventh grade students at Mills Middle School preferred round chocolate candies to hard can

dy. When Jennifer duplicated the survey, 1/9 of the students changed their preference from chocolate candy to hard candy.
What fraction of the students in the second survey preferred round chocolate candy?

A. 8/27
B. 7/162
C. 5/ 18
D. 1/2
Mathematics
1 answer:
andre [41]2 years ago
8 0

Answer:

The correct answer is C) 5/18

Step-by-step explanation:

In order to find this answer, you need to take the fraction that answered it on the first try and subtract the number that changed their mind.

7/18 - 1/9

In order to complete this operation, you need to give them common denominators.

7/18 - 2/18 = 5/18


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The height (in inches) of adult men in the United States is believed to be Normally distributed with mean μ . The average height
Jlenok [28]

Answer: a. 69.72 ± 1.37

Step-by-step explanation:

We want to determine a 90% confidence interval for the mean height (in inches) of adult men in the United States.

Number of sample, n = 25

Mean, u = 69.72 inches

Standard deviation, s = 4.15

For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.

We will apply the formula

Confidence interval

= mean ± z × standard deviation/√n

It becomes

69.72 ± 1.645 × 4.15/√25

= 69.72 ± 1.645 × 0.83

= 69.72 ± 1.37

The lower end of the confidence interval is 69.72 - 1.37 = 68.35

The upper end of the confidence interval is 69.72 + 1.37 = 71.09

5 0
3 years ago
Perform the operation.<br> (-2x^2 – 8x + 3) + (-9x^2 + x + 3)
ludmilkaskok [199]
The answer is: - 11x^2 - 7x + 6
3 0
2 years ago
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Can someone please tell me the answer to this question ASAP! Thank you!!
zubka84 [21]

Answer:

C, He will need 20.1 inches of bracing

Step-by-step explanation:

This is can be found using Pythagorean Theorem and multiplying the quantity by 3

4 0
3 years ago
Lots took one hour to drive from his apartment to philips arena and back. the return drive took 8 minutes less than the trip to
noname [10]

The equation would use to determine how long he drove each way is 2x - 8 = 60.

<h3>What is the equation?</h3>

The equation is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are equal.

We have been given that Lots took one hour to drive from his apartment to Philips arena and back. the return drive took 8 minutes less than the trip to the arena.

Since the return trip took 8 minutes less, the complete equation must be written in minutes.

Here x - 8 represents the time it took to return to Philips Arena.

The total travel time, including both directions, was 60 minutes;

thus, add x and x - 8 and set them both equal to 60.

So 2x - 8 = 60

Therefore, the equation would use to determine how long he drove each way is 2x - 8 = 60.

Learn more about the equation here:

brainly.com/question/10413253

#SPJ4

6 0
1 year ago
What is the value of sin(60°+0) - sin(60°+0)?
neonofarm [45]

Answer:

0

Step-by-step explanation:

Let us take sin(60 degree + theta) =x

Substituting x in equation

=> x-x

=> 0

3 0
3 years ago
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