The sum of three consecutive numbers is 240. Find the three numbers. (Hint: LEt x stand for the smallest number. Since the numbers are consecutive, add one to get the second number and add 2 to get the third number

79, 80, 81

Step-by-step explanation:

Write an equation using the information given. I chose to use the middle value as my x value. The equation is:

x + (x + 1) + (x - 1) = 240

You can get rid of the parenthesis and simplify the equation. The positive one is cancelled out by the negative one so you are left with x + x + x = 240 or it can be rewritten to get 3x = 240.

3x = 240

Divide both sides by 3

x = 80

Since I used x to be the middle number, I can find the other 2 numbers by adding and subtracting one.

79 + 80 + 81 = 240

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

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