Which polynomial is a cubic trinomial? 2x3−2x2 2x3−2x2−4x 2x2−4x+6 2x3+6

2x3−2x2−4x

Step-by-step explanation:

Step-by-step explanation:

A cubic is an algebraic expression whose highest degree or exponent is 3 on the variable. A trinomial is an algebraic expression which is composed of three terms separated by addition or subtraction. When an expression meets both conditions, it is a cubic trinomial.

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.

0 is its x and y coordinate