Let f(x)=20/1+9e3x . what is the y-intercept of the graph of f(x) ? enter your answer in the box

It's not entirely clear due to lack of parenthesis, but I think your function has 20 all over the quantity 1+9e^(3x)

If so, then you should write it as such: 20/( 1+9e^(3x) )

Let's plug in x = 0 and see what the function output is

y = 20/( 1 + 9e^(3x) )

y = 20/( 1 + 9e^(3*0) ) ... replace every x with 0

y = 20/( 1 + 9e^(0) )

y = 20/( 1 + 9(1) )

y = 20/(1+9)

y = 20/10

y = 2

Therefore the y intercept is 2 meaning that the graph crosses the y axis at the location (0,2). The y intercept is always where x = 0. Since 0 is a good starting point, the y intercept is often used as a starting value.

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answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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