toxicsugar22
  • toxicsugar22
Suppose x and y are two possitive numbers. Write an expression for their average, and then for the reciprocal of their average
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
what is the average of n numbers?
toxicsugar22
  • toxicsugar22
i dk am i dupposed to know or is it in the question
anonymous
  • anonymous
you are supposed to know.

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
suppose I had profits of 1000 dollars in one month and a profit of 500 dollars is the next month, what is my average profit for the two months?
anonymous
  • anonymous
in other words, what is my average profit per month?
toxicsugar22
  • toxicsugar22
750
anonymous
  • anonymous
okay, good. how did you figure that out?
anonymous
  • anonymous
doing good sugar haha (:
toxicsugar22
  • toxicsugar22
i added 1000 and 500 and divided by 2 to get the average
anonymous
  • anonymous
good. so what if I told you that my profit for first month was 1000, second month was 500 and third month was 600. what is my average profit?
toxicsugar22
  • toxicsugar22
700
anonymous
  • anonymous
very good. what did you do to get that answer?
toxicsugar22
  • toxicsugar22
i added all three and divided it by three
anonymous
  • anonymous
good. so what if I told you my profit for the first month was x and my profit for second month was y, what is my average profit?
toxicsugar22
  • toxicsugar22
would it be x+y divided by 2
anonymous
  • anonymous
exactly! very good!
anonymous
  • anonymous
so your expression is average = (x+y)/2
anonymous
  • anonymous
if you had 10 numbers, then your average would be (a+b+c+d+e+f+g+h+i+j)/10
anonymous
  • anonymous
where a,b,c... are the 10 numbers
toxicsugar22
  • toxicsugar22
ok and can u tell me how do i write the recipocal of the average
anonymous
  • anonymous
reciprocal of a number x is 1/x. the reciprocal is a number, which when multiplied by x, gives you 1. 1 is called the multiplicative identity. so, when you multiply x times 1/x, you get x/x = 1 similarly, what is the reciprocal of the number (x+y)/2 ?
toxicsugar22
  • toxicsugar22
ok i got it its 2/(x+y)
anonymous
  • anonymous
okay very good!
toxicsugar22
  • toxicsugar22
and one more quesion, for the same numbers x and y, write an expresiion for their average of their recipocals how do i do that
anonymous
  • anonymous
what is the reciprocal of x? what is the reciprocal of y?
toxicsugar22
  • toxicsugar22
x/1 and y/1 is that right
anonymous
  • anonymous
so if you multiply x times x/1 you will get 1? are you sure?
toxicsugar22
  • toxicsugar22
im srry 1/x and 1/y
anonymous
  • anonymous
okay good. so now you have two numbers 1/x and 1/y. what is their average?
toxicsugar22
  • toxicsugar22
2/xy
anonymous
  • anonymous
no. thats wrong. the average of two numbers a and b is (a+b)/2 so what is the average of two numbers 1/x and 1/y?
toxicsugar22
  • toxicsugar22
(1/x+1/y)/2
anonymous
  • anonymous
okay. good. that is your answer. you can simplify the expression further if you want, but that is the answer to your question. 1/x+1/y = (x+y)/xy so (1/x+1/y)/2 = (x+y)/2xy
toxicsugar22
  • toxicsugar22
ok thank you
anonymous
  • anonymous
or rather, 2(x+y)/xy
anonymous
  • anonymous
no, its the first one. sorry.
toxicsugar22
  • toxicsugar22
ok thanks
anonymous
  • anonymous
(:
toxicsugar22
  • toxicsugar22
hey can u help me with another question math mind can u try
toxicsugar22
  • toxicsugar22
Andy drives 300 miles to Lake Tahoe at 70 miles per hour and returns home at 50 mph. What is his average speed for the round trip. (It is not 6o miles per hour.) Write expressions for the time it takes for each leg of the trip if Andy drives a distance d, at speed r base 1 and returns at speed r base 2
anonymous
  • anonymous
post it up as a new question, it's better

Looking for something else?

Not the answer you are looking for? Search for more explanations.