Work out the value of: 3x + 2y When x = 2 and y = -5

-4

Step-by-step explanation:

plug in 2 for the x, plug in the -5 for the y which will give you the equation 3(2)+2(-5)=

3 x 2 is 6

2 x -5 is -10

then you will have 6 - 10

and your answer is -4

-4

Step-by-step explanation:

3x+2y=

(3x2)+(2x(-5))

6+(-10)

-4

radius=5, centre=(-1,-2)

Step-by-step explanation:

You need to complete the square for both x and y.

breaking the equation up we find that: in completed square form = which simplifies to . Remember that you complete the square by halving the "b" value and then squaring it. 2/2 squared=1. Also, the one that you add to complete the square must be added to the other side of the equation to get 20+1.

Now onto the y value in completed square form =. The 4 that you add to get it into the quadratic form must be added on other side of the equal sign to get 20+1+4.

the final equation is