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Illusion [34]
3 years ago
6

Which of the following expressions could give the total amount of a $45 restaurant bill with a 15% tip added on? (0.15)($45) (0.

15)($45) 1 + (0.15)($45) $45 + 0.15
Mathematics
1 answer:
Akimi4 [234]3 years ago
6 0
The correct answer is 45+45(0.15). This is because you need to first count the price, and then add on the tip which is a certain percentage of that price. Hope this helped!
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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.

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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

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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.

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Find the volume of the prism below
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