Expand and simplify
X (2x – 4) + x(5x + 8)
Plz help :(

7x^2 +4x

Step-by-step explanation:

x (2x – 4) + x(5x + 8) =

(2x^2 -4x) + (5x^2 8x) =

2x^2 -4x + 5x^2 8x =

7x^2 +4x

Look at the attached picture⤴

Hope it will help u...

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2