Identify the terms and like terms in the expression -9 + x*2 - 3x*2 + 4x

Step-by-step explanation:

The expression -9 + x*2 - 3x*2 + 4x has the following terms:

-9, x^2, -3x^2 and 4x.  Please note:  x^2 is correct if you meant "the square of x."

a) there is only one constant term; it is -9.

b) there are two terms involving x^2:  x^2 and -3x^2.  Combining them results in -2x^2.

c) there is only one term involving x:  It is 4x.

d) -9 + x*2 - 3x*2 + 4x becomes -2x^2 + 4x - 9.  Again, please use " ^ " to indicate exponentiation.

{x = -1/2 ,   y = -1

step-by-step explanation:

solve the following system:

{2 x + y = -2

{10 x - 3 y = -2

in the first equation, look to solve for y:

{2 x + y = -2

{10 x - 3 y = -2

subtract 2 x from both sides:

{y = -2 x - 2

{10 x - 3 y = -2

substitute y = -2 x - 2 into the second equation:

{y = -2 x - 2

{10 x - 3 (-2 x - 2) = -2

10 x - 3 (-2 x - 2) = (6 x + 6) + 10 x = 16 x + 6:

{y = -2 x - 2

{16 x + 6 = -2

in the second equation, look to solve for x:

{y = -2 x - 2

{16 x + 6 = -2

subtract 6 from both sides:

{y = -2 x - 2

{16 x = -8

divide both sides by 16:

{y = -2 x - 2

{x = -1/2

substitute x = -1/2 into the first equation:

{y = -1

{x = -1/2

collect results in alphabetical order:

answer:   {x = -1/2 ,   y = -1

125 yards

step-by-step explanation:

i take 75 plus 50.