An elevator goes up 7 floors and then down 4 floors. what integer represents the change in the floor level?

The integer would -3.

Step-by-step explanation:

Think of it this way:

The elevator goes +7 (Positive = Up) and then -4  (Negative = Down). What is 7-4? That's easy it's just 3. But since the floor level goes down, it would be negative. So you just make it -3.

Check your work:

If we went up from the 4th floor by three, we would get up to the 7th floor.

Hope it Helps!

step-by-step explanation:

a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 2 times the age of the child?

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this needs to be the answer format, or else your answer is incomplete.

if the number of years is x, then the equation is

in __ years

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.