Perform the following operations and prove closure. 1. (x)/(x+3) + (x+2)/(x+5)

2. (x+4)/(x^2+5x+6) * (x+3)/(x^2-16)

3. (2)/(x^2-9) - (3x)/(x^2-5x+6)

4. (x+4)/(x^2-5x+6) / (x^2-16)/(x+3)

the answer is 45 i just did it on oddesy ware

{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

here is a big fat

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734