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Rashid [163]
2 years ago
8

Mrs. Adele is buying a new tie from Macy's. It says

Mathematics
1 answer:
Vaselesa [24]2 years ago
6 0

Answer:

$11.25

Step-by-step explanation:

You take the original cost and multiply it by 0.25 for 25%. You get 3.75. Then you subtract 3.75 from 15.00. The answer is $11.25

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In a study of the stability of IQ scores, a large group of individuals is tested once at age 18 and again at age 35. The followi
Naddika [18.5K]

Answer:

112

Step-by-step explanation:

Given that in a study of the stability of IQ scores, a large group of individuals is tested once at age 18 and again at age 35.

Age 18: average score = 100, SD = 15

Age 35: average score = 100, SD = 15, r = 0.80

Let us obtain regression equation of y on x.

Let y be the scores at age 35 and x at age 18

Slope = r(s_y/s_x) = 0.8(\frac{15}{15} )=0.80

The line passes through (100,100) being average of x and y

Hence regression line would be

y-100=0.8(x-100)\\y = 0.8x+20

a) Here given that x =115

Hence y=0.80(115)+20\\=112

the average score at age 35 for all the individuals who scored 115 at age 18, would be 112.

b) Prediction also would be the same 112.

5 0
3 years ago
a horticulturalist is building a fence around a rectangular garden using the side of a building for one side of the enclosure. s
Harman [31]
The garden area is maximum when the enclosure is a square.
If a is the length of the side of the square then the length of the building is also a.
The perimeter length is 4a made up of 81+a feet, so 81+a=4a and 3a=81 making a=27 feet.
5 0
2 years ago
mile is going to give buddys dads company 5 hour and not a minute more. what part of the day is he giving them written as a frac
cluponka [151]

The fraction of the time given in a day is 1/288

Given the following parameters

  • The minute that mile gave his buddy = 5minuts

We are to get the fraction of this time in a day.

Convert 1 day to minute

  • 1 day = 24 hrs * 60 mins
  • 1 day = 1440 minuts

Fraction = 5/1440

Fraction = 1/288

Hence the fraction of the time given in a day is 1/288

Learn more on fractions here: brainly.com/question/78672

7 0
2 years ago
Estimate the area of Tennessee if the base of the parallelogram is 440 miles and the height is 100 miles. What is the estimated
Reika [66]

Answer:

44,000 square miles

3 0
3 years ago
Read 2 more answers
An article claims that 12% of trees are infested by a bark beetle. A random sample of 1,000 trees were tested for traces of the
galben [10]

Answer:

0.68

Step-by-step explanation:

The formula for z test is given above as:

z = p' - p/√(pq/n)

p' = sample proportion

= Number of infested samples(trees)/ Number of samples

p' = 127/1000 = 0.127

p = 12% = 0.12

q= 1 - 0.12 = 0.88

n = number of samples = 1000

z = 0.127 - 0.12/√(0.88 × 0.12/1000)

z = 0.007/√0.0001056

z = 0.007 /0.0102761861

z = 0.6811865737

Therefore, the z test statistic is approximately ≈ 0.68

6 0
3 years ago
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