Given f(x)=x^4-7x^3+6x^2+8x+9
a) determine the x- and y-coordinates of the lowest point on the graph.
b) size the x-window from [-10,10]. find the highest and lowest values of f(x) over the interval -10≤x≤10
c) find the highest and lowest values of f(x) if -2≤x≤6

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.

idk

step-by-step explanation:

use that smart brain