Math

QuestionFind the year when income yy reaches 728.34 billion using the equation 112.4(x2010)=7y3749.58112.4(x-2010)=7y-3749.58. What is yy?

Studdy Solution

STEP 1

Assumptions1. The equation given is valid and describes the relationship between the year and the income taken in by the social security administration. . The trend described by the equation continues into the future.
3. The value of yy we are looking for is728.34 (in billions of dollars).

STEP 2

We are given the equation112.4(x2010)=7y3749.58112.4(x-2010)=7 y-3749.58and we are asked to find the year xx when y=728.34y=728.34.

STEP 3

First, we substitute y=728.34y=728.34 into the equation.
112.(x2010)=7×728.343749.58112.(x-2010)=7 \times728.34-3749.58

STEP 4

Next, we simplify the right-hand side of the equation.
112.4(x2010)=5098.383749.58112.4(x-2010)=5098.38-3749.58

STEP 5

We continue to simplify the right-hand side of the equation.
112.4(x2010)=1348.8112.4(x-2010)=1348.8

STEP 6

Next, we isolate xx by dividing both sides of the equation by112.4.
x2010=1348.8112.4x-2010=\frac{1348.8}{112.4}

STEP 7

We calculate the right-hand side of the equation.
x2010=12x-2010=12

STEP 8

Finally, we solve for xx by adding2010 to both sides of the equation.
x=2010+12x=2010+12

STEP 9

We calculate the value of xx.
x=2022x=2022In the year2022,728.34 billion dollars will be taken in.

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