(4h+6h2 +1) – (5h2– 8h4 +6)
need simplify

8h^4+h^2+4h-5

Step-by-step explanation:

(4h+6h^2+1)-(5h^2-8h^4+6)

4h+6h^2+1-5h^2+8h^4-6

8h^4+h^2+4h+1-6

8h^4+h^2+4h-5

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.